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Literary and Scient(fic Mirror.
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No. 235,-Vol. V.
TUESDAY, DECEMBER 28, 1824.
BT M. ALEX. B.
limits of the circle in which nature has condemned him action of a heat capable of keeping them in a state of conto vegetate ? I will not, however, add one word more
stant fusion. This fact is demonstrated by the enormous LETTERS ON THE REVOLUTIONS OF THE GLOBE
upon this subject ; let us only remember, in all our future masses of liquid metallic matter ejected by volcanos.
inquiries respecting the causes of the revolutions which There is every reason to believe, as we shall soon see, La legère couche de vie, qui fleurit à la surface du globe, ne our globe has undergone, how insufficient are our means that the foci of volcanos are situated at immense depths ouve que des ruines.
of investigation to the discovery of the great truths of under the soil. Besides, the number of volcanos, as well Paris: printed, 1824.
which we are in search, and how uncertain and irregular extinct as burning, which is infinitely more considerable Trandsted expressly for the Kaleidoscope from a recent Prench must be our progress towards it.
than is generally thought, and the perfect resemblance Work.]
The terrestrial spheroid is generally divided into two existing between the lavas of those situated in the most LETTER II._OF THE INTERNAL MASS OF THE GLOBE.
parts, whose limits are arbitrarily fixed; the internal mass, distant places, cannot be explained by any of the local It is well known that the form of our earth is that of a that is to say, the central part, to which we shall never be causes by which philosophers were for a long time willing heroid, rather flattened at the poles. Its radius is 1500 able to penetrate ; and the mineral crust, which serves to to account for them. This resemblance naturally leads to agues in length. The highest mountains are not elevated envelop the internal mass ; the latter may be supposed to the supposition, that they derive their common origin ore than two leagues above the level of the sea ; there be ten or twelve leagues in thickness, but only its most su- from a burning mass, identical in its composition. Mine. e very few countries, whose natural situation is below perficial part is exposed to our observation.
ral springs and thermal waters of every kind, some of at level, and the greatest depths that have been at
To these two principal parts, may be added two others, which still preserve the heat of boiling water when they ined, in digging quarries and mines, do not exceed which require to be studied separately, the mass of waters issue from the grouud, present us with
new proofs of the 00 feet. The inequalities of the soil are then very in which cover more than three-quarters of the surface of the high temperature existing at a certain depth" under the siderable, when compared with the total mass of the spheroid, and the atmospheric mass, which is a thin Auid surface of the earth. restrial spheroid; and if the profound abysses which entirely surrounding our globe, and extending to an inde- We are indebted to M. Trebra, the director of the wn upon its surface inspire us with terror, if we behola terminate height. We shall first speak of the internal mass- mines
, for one of the most curious observations that have th Fonder the lofty mountains whose summits are lost Every one has, perhaps, at some time or other, felt curi- been made in modern times. This gentleman having the clouds, it is because we compare them with the ous to know, whether the whole mass of the globe consist had occasion to visit the deepest artificial cavities, disco tremely diminutive objects by which they are sur- of a succession of layers analagous to those observed near vered that the temperature constantly rises, in proportion unded.
its surface, or whether the same kind of substance being as we approach the centre of the earth, and that this aug. The contour of the earth, whose surface now appears to always found at a certain distance from every point of its mentation takes place in a regular manner, that is, at the so rugged, would, if comprehended at a single glance, surface, it may thence be concluded that the interior of rate of a degree in 150 metres
. Consequently, in very esent the appearance of a glo as smooth as those the globe is entirely composed of it. For the solution of deep mines the heat becomes insupportable. ich have received the last polish from the hands of the these questions, geologists have invagined hypotheses You will easily understand, Madam, how impossible
widely differing from each other. They have successively it is to suppose, after this discovery, that the earth has no Let us suppose the inequalities upon the surface of the supposed the interior of the earth to be filled with water, other heat than that communicated to it by the rays of the th imitated in relievos upon a ball of three inches in gas, with an enormous mass of loadstome, and with metals, sun. This solar heat, though capable of producing upon Deter, representing the terrestrial spheroid. Protu, either in a solid or a liquid state.
its surface the changes of the seasons, and the alternate Inces almost imperceptible, even with microscopic aid, Diderot, whose principal object it was to explain the temperatures of day and night, does not extend its in.' Id supply the place of the highest mountains ; the magnetic action of the carth, considered its internal part Auence to any considerable depth, as may be perceived atest scratch would be deeper in proportion to its to be formed of a vitrified nucleus, upon which the fric- by the coolness of all subterraneous places. A thermoneter than are our greatest artificial cavities relatively tion of the exterior moveable shell produced the same meter, placed at the observatory, at the depth of eighty. hat of the earth; and the condensed vapour, occasioned effect, as that caused by the rubbing of the cushions of an seven feet under the ground, did not, during the hottest breathing upon its surface, would, perhaps, be too electrical machine against its cylinder.
summers and coldest winters of the priod between the k to represent the atmosphere to the height where The most probable of all these hypotheses, and the only years 1787 and 1819, vary 1-37th of a degree. ds are formed.
one compatible with all the phenomena that have till now The temperature is generally admitted to be invariable for ourselves, imperceptible atoms who vegetate in been observed, is that in which it is admitted that the in- at the depth of 100 feet below the surface of the earth; thin layer of humid air, it is impossible to describe; ternal mas is composed of metallic matter kept in a state but instead of continuing at the same degree at all depths by comparison, our insignificance, and the insufficiency of fusion by the action of heat
below that point, it then begins gradually to increase, in or agency to the operation of any change upon the We know the exact magnitude of the earth, and it is proportion as we approach the centre of the earth.
also possible for us to calculate its weight. Natural phi. The more we reflect upon the subject, the more we are Nevertheless, we have measured the earth, whose losophy and astronomy furnish us with two different convinced how extremely limited and superficial is the ensions reduce us to comparative nothingness; we means of attaining this knowledge. The result of each action of the solar heat. The effect produced by it is measured the sun, which is a million times larger of these is a weight so considerable, that the interior of scarcely perceptible, except in places where it is concen
the earth; we have calculated the distance which the earth must necessarily be five or six times more dense trated by the reflexion of surrounding objects. So incon lates us from that star, whose lustre our weak vision than the mineral crust, supposing the latter to consist en. siderable is its influence upon high mountains, that the pt support ; we have discovered in the millions of tirely of a succession of layers similar to those observed summits even of those situated under the equator are cowhich shine in the firmament, so many suns scat- near its surface. The internal mass is therefore formed vered with snow, which does not begin to melt at any in the immeasurable regions of the universe, and neither of gas nor water, nor even of the hardest stone height exceeding that of 4,800 metres above the level of ng along with them opaque globes, whose move with which we are acquainted. In any of these cases, its the sea.
they regulate. Capable of elevating ourselves to weight would be three or four times less considerable than If the mineral crust were less thick, the internal heat, lea of infinity, the earth, lost in boundless space, we have reason to believe it to be ; but it must consist en- penetrating more easily to the surface of the soil, would Is to dwindle before us to the diminutiveness of a tirely of substances as heavy as our heaviest metals. probably occasion there a temperature much more elevated of sand.
These metals, as they exist in the internal mass, have than that which we feel in the preseñit state of things. It here not, then, Madam, cause to exult in the superior not the solidity imparted to those exposed to the tempera- is, therefore, the general opinion that the surface of the :e of the mind of man, which demands for the exer- ture which reigns upon the surface of the soil. All cir. earth is constantly growing cooler, although so slowly that of its powers a scope so far exceeding the narrow cumstances concur to prove that they are subject to the the change is hardly perceptible:
loss of one-third in consequence
Many naturalists have even been led to consider our
ducing the ton to 2000 pounds for the sake of rougd globe as a small incrustated sun. According to them, its [Comprehending Notices of new Discoveries or Improve. power of traction of 100 pounds
moves a mass of gasto
numbers, as in the last calculation, we find here thet a whole mass must primitively have been incandescent like ments in Science or Art; including, occasionally, sin: pounds; or the resistance which the water opposes te te that of the sun; since it began to move in space, it has become sufficiently cold, to permit its exterior part to grow
losophical, Botanical, Meteorological, and Mineralogical or entire weight. At sea, where the water way is of us.
Phenomena, or singular Facts in Natural History : limited breadth, the resistance is probably one-third les ; solid. This hard envelope has, in the course of ages, in
Vegetation, &c.; Antiquities, &c.; List of Patents ;creased in thickness; and the earth, thus growing cold by
but, as a compensation for this, when steam power is em
to be continued in a series through the Volume.) ployed, there is probabl degrees, is irrevocably condemned finally to be converted
of the disadvantageous mode of its application. into a frozen lifeless mass, revolving round a sun, whose
We see, then, that the effect produced by the draught heat, also gradually diminishing, will at length be entirely In the Mercury of the 17th instant, the editors ven- thirty times as great upon a canal as upon a wel-made
of a single horse is ten times as great upon a railway, and exbausted.
tured to dissent in opinion from the able editor of the road. Yet a railway costs only about three times as muck Do not, Madam, entirely despise this opinion, which Scotsman, on the subject of some of the positions laid as a good turnpike
road," and a canal about nine or tea has been admitted by Buffon ; be not either too much down in the following article. The view taken by the times! and the expense of keeping the railway and canal disheartened by the probability that it is well founded, as other learned men have encouraged us to hope that its respondent of that journal, whose letter appeared last were railways to come into general use, two-thirds er mere Mercury derives additional countenance from an able cor
in repair is probably less in proportion to the original st.
lay, than in the case of a road." It is obvious, then, the correctness may very reasonably be doubted. It is true Friday. In order that our scientific readers may be en- of the expense of transporting commoditis world be that many of them do not promise us a much more agreeabled to decide between the Mercury and the Scotsman, saved. With regard to the comparative adrantages of able fate ; they condemn us, or rather our descendants, to it is only fair that we here insert the whole of the original canals and railways, so far as the present facts go, te may see our rivers, lakes, seas, and oceans gradually evaporate, until the earth, being dried up, will be set on fire by the article, out of which a discussion has arisen, which will, observe, that if a horse power effects three times to rent sun. Upon the whole, I should prefer this mode of des give a place here to the comments of the Mercury on that same rates or dues per ton to make the capital yield te in all probability, be further prolonged. We shall also three times as much, and will of course require nearls ebe
upon a canal as upon a railway, the canal costs about struction to the other; it is more prompt, and the splendid article, omitting the paragraphs commented upon, as they same interest. conflagration which it leads us to anticipate, is less ter will be found in the extract from the Scotsmai.-Ed. Kal.
But here it is of great importance to recollect that ti rific to the imagination, than the lingering frozen death
computation refers solely to a velocity of treo miksan hinde threatened by Buffon.
(FROM THE SCOTSMAN.]
the friction which impedes the motion of a car or Some chemists have assured us that the earth will again In our last we gave a brief account of the nature and gon, and the resistance which the water offers to the revive from its ashes, and that this great combustion will construction of railways. We now pursue our inquiry gress of a ship, were governed by the same laws, the sale occasion so considerable a quantity of water, that it must into the effects of a determinate force of traction employedbe. But this is far from being the case, as we shall pre
conclusions would hold true whatever the velocity right on railways and canals evaporate for several centuries, before some continents can be left dry. The form of the earth is exactly that which in different modes, errors often arise from considering
this of a horse power,
to refer to a determinate and consta In calculations respecting the power of a horse exerted sently see. In illustrating this point, it will be conta would be impressed upon its mass, by the action of gravity, power as a constant quantity, which it is not. if it were in a liquid state ; and this fact was for a long pull, an ordinary horse exerts a force of traction equal to force of traction of a given anount. We shall therefas time produced to corroborate the hypothesis of the earth's 150 pounds; this is reduced to less than one-half when he assume, that the body to be moved is urged forward
travels four miles an hour ; to one-ninth part when he force exactly equivalent to a weight of 100 pounds, primitive state of incandescence.
travels eight miles an hour; and at 12 miles an hour, his pended over a pully at the end of the plane on whidi Voltaire has much ridiculed Maupertuis, for having whole strength is expended in carrying forward his own proposed the expedient of piercing a hole to the centre of body, and his power of traction ceases. It is supposed is deduced from the constitution of fluids, and confirmed
First, with regard to the motion of a body in water
. the earth; this would nevertheless be the surest means of here that the horse performs pretty long journeys. When by experiment, that the resistance whịch a floating body discovering what species of matter is there contained ; yet, ably greater; and his power of traction
may perhaps cease of the velocity:t Now, taking
as a basis the koera
encounters in its motion through the fluid is as te sware if our conjectures be well founded, it would be impossible only at a velocity of 15 or 16 miles an hour. But in com effect of force of 'traction of 100 pounds at two mile e to penetrate far, on account of the extreme heat that would mon cases a velocity of 12 miles may be taken as the hour, let us ascertain what force would move the same soon become perceptible. Whatever might be the success maximum, and for the convenience of calculation the of such an attempt, it would at least be curious to ascertain dead-pull may be taken at 145 pounds. Adopting, then, body at a greater velocity. On the canal, or am of the
sea, we bave seen that a hody weighing 90,000 pounds! the kind of obstacle that would prevent its completion, and of velocity (cs) will be=(12--012. Thus, the force exerted, impelled at the rate of two miles an hour by a force of I cannot help regretting that po sovereign has yet under- at 2 miles an hour, will be 100 pounds; at 4 miles, 64. pounds; therefore, to move the same body taken an enterprise so worthy of awakening ambition. pounds; at 6 miles, 36 pounds; at 8 miles, 16 pounds;
At 4 miles an hour, will require... 400 pounds
. 'At 6 ditto
900 ditto. One step has been made towards the accomplishment of a and at 10 miles, only 4 pounds. Steam-engine makers
ditto ......1600 ditto. work of this nature in the labours already executed in the assume a horse-power to be equal to a weight of 180 or 200 pounds, but this is to be considered merely as an arbitrary
...3600 ditto. deepest mines. and conventional standard, adopted for a particular pur.
Or conversely :I shall terminate this letter by remarking, that however pose. It is necessary to keep this general conclusion in
100 pounds moves 90,000 pounds at 2 miles an hou. considerable the number of volcanos may be in our days, view when we speak of the application of horse-power to
ditte. it must formerly have been much greater.
the traction of loaded waggons and vessels.
or 5,620 There is no country in which traces of extinct volcanoes canal, is of an extremely different kind from that which
ditto. or 2,500
ditto. do not abound; they are discovered by the beds of lava a carriage of any kind experiences upon a common road resistance of water, a great increase of power produces
Hence we see that when we have to contend with with which they have covered the surrounding soil, and or a railway. In the former case it arises from the pres: a small increase of velocity. To make
a ship sail M. which often extend to very great distances. Some geologists have even gone so far as to believe that that of the rim of the wheel on the gravel or iron rail
. power; and to make her sail
six times faster, we the latter, from the friction of the axle in its box, and times faster, for instance, we must employ nine time all mountains had a volcanic origin; but they were wrong. The motion of the body in both cases is resisted also by ploy no less than thirty-six times the power. Let us sera It is at least certain that the number of ancient volcanos the air; but this resistance, which is small in amount, for example, that it were required to determine, size is, by the result of the most enlightened researches, daily generally speaking, we shall throw entirely out of view in horse draws a boat, loaded with thirty tons, at two mila demonstrated to have been much greater than it has till the first instance, in order to simplify our calculations.
an hour, how many horses would draw the same best now been supposed. It is impossible, in France, to make ton, in a cart weighing 7 cwt at the rate of two miles an
On a well-made road a horse will draw a load of one four miles. We find, first, that since the boat is to me
two times as fast, it will require fonir times thie alle excavations for fifty leagues in any direction, without find. hour.-( Leslie's Elements, p. 253.) The whole strength amount of power, or 400 pounds. But a horse, moving ing beds of lava. The first volcanos of the earth were of the
horse is exerted in overcoming the friction. On such four miles an hour, pulls only with a force of 64 pound opened in the primitive soil before the secondary soil was a road, therefore, a force of traction of 100 pounds moves 400 pounds, and move the boat at the rate proposed. formed; they have since been covered by layers of soil, a weight of 3000 pounds, or the friction is 1-30th part of
Let us now see what amount of power will produce en of which the successive formation has so evidently been the load (the cart included.) occasioned by the sea or immense lakes of fresh water. in our former paper, that a horse travelling at the same tion occasioned by friction, instead of increasing as the
On a railway of the best construction, it has been shown responding effects upon a railway. And before we tak But, without anticipating what I shall presently have to rate of two miles an hour, draws 15 tons, including the say upon this subject, I will be contented with remarking vehicles. In this case, then, a power of traction of 100 square of the velocity like the resistance of a fluid, increase that this immense quantity of volcanos opened in the pri- pounds moves a weight of 33,600 pounds ; the friction, of in the simple ratio of the velocity. We have seer, the mitive soil, while the solid crust was less thick, tends much course, is 1-366th part, or, in round numbers, 1-300th that a force of traction of 100 pounds, upon a level rail patt of the load.
way, moves a body weighing s0,000 pounds, at the rate di to confirm the opinions of which I have spoken to
On a canal, a horse, travelling at two miles an hour,
and Wooller, we find the expense to be
* In Mr. Telford's estimates for portions of new road latter times may be accounted for as well by the diminish
at 6 at 8 at 12
Boats in some cases carry only 15 or 20 tons; in others from $1000 to £1100 per mile, including the price of the ed activity of the internal focus, as by the increased thick. 35 (as the coal boats on the Union Canal) but in the one case ness of the layer by which it is covered.. they travel quicker, and others slower, than the rate men- See Playfair's Outline, I. 198.; Leslie's Elements, section
vii. article Resistance ; Encycl. Brit. .
two miles an hour. We may hence calculate the effect ploy, is an element that may be entirely neglected, would or fly-wheel, to limit or equalize the motion, the pheno produced by any greater amount of power :
then become the principal retarding force. We need menon may be put to the test, under circumstances very 10,000lb. are moved at 2 miles an hour by a power of 100lb. scarcely add, that the question of time or velocity; rightly analagous to those supposed by the hypothesis of the Scotch at 4 miles by
2001b: considered, involves every thing connected with the mer- theorist. A small wheel carriage may easily be constructat 6 miles
300lb. cantile advantage of different modes of communication. at 8 miles by
We have here considered the subject in a purely theore-ed, to be impelled forwards by clock-work. Such a carat 12 miles by
600lb. tical light, leaving it to the engineer to find the means of riage may be made to revolve in a small circle; and, Or conversely:
giving effect to the truths we have stated. We shall enter indeed, we have seen a model of the kind in operation. A power of 100 pounds moves 30,000lb. at 2 miles per hour. into various details in a future paper, and touch upon some Now, if this machine were placed under the receiver of as
or 15,000lb. at 4
it right to say, that the conclusions we have announced perfect an air-pump as can be constructed, and put into or 7,500lb. at 8
are strictly conformable to experiments carefully made by motion; if the theory under investigation be correct, a or 5,000lb. at 12
Vince and Coulomb,—but as there are anomalies in the visible acceleration in speed ought to take place. But Hence we see that, though a moving force of one hun- doctrines regarding friction, and as the velocities employed we will wager'a few pounds with our brother editor, that dred peands produces three times as great an effect upon in the experiments alluded to were much lower than some a canal as upon a railway at two miles an hour, this su- that are likely to occur in railway communications, we do no such result will occur; and if we win, we will expend periority of the water conveyance is lost, if we adopt a not take upon us to guarantee the literal accuracy of the the amount in books for our Apprentices and Mechanics' relocity at six miles an hour, and at all greater velocities principles laid down as applicable to every possible ve. Library." the same expenditure of power will produce a greater ef- locity. We certainly believe that the conclusions founded We cannot divest ourselves of the persuasion that bodies, feet upon a railway, than upon a canal, a river, or the sea. upon in our calculations, will hold true at all the veloci- moving on an horizontal plane, even if there were no op
This calculation proceeds on the hypothesis that the ties whatever, and they are stated without limitation by friction increases in the simple ratio of the velocity. Such the most profound mechanicians, Leslie, Playfair, Young, position from the atmosphere, do not follow the law of was the opinion of Ferguson, Mushenbroch, and some &c., but we thought it right to mention a circumstance bodies falling perpendicularly to the earth. other writers; but the more recent and accurate experi- which some may consider as materially affecting their uni- A body falling, or gravitating to the earth, moves ments of Coulomb and Vince have overthrown this doc-versal application.
quicker as it approaches it:- the earth being the source of trine, and established conclusions extremely different, of which the following is an abstract :
attraction, acts more powerfully upon the body attracted 1. The friction of iron sliding on iron is 28 per cent. of
(FROM THE LIVRAPOOL MERCURY.)
the nearer it approximates it. the weight, but is reduced to 25 per cent after the body RAIL ROADS AND NEW MECHANICAL PARADOX. If a magnet (and such the centre of the earth may be is in motion. 2. Friction increases in a ratio nearly the same with
-In a late number of the Scotsman, an article appeared regarded, by way of illustration) be held at a distance that of the pressure. If we increase the load of a sledge on the subject of rail-ways, which is of so extraordinary a from a steel ball, it will attract it in a ratio increasing as or carriage four times, the friction will be nearly, but not nature, that we shall appropriate the whole of it in the the squares of the distance decrease ;—the magnet being quite, four times greater.
scientific department of the Kaleidoscope, in the hope that the source of attraction, the ball must necessarily accele2. Friction is nearly the same whether the body moves some of our readers may be induced to investigate certain rate in speed, until the two bodies come into contact. But upon a small or a greater surface; but it is rather less when paradoxical positions therein laid down, which we suspect it appears to us that a locomotive machine, moving on a the surface is small.
(a) It is with this last law only that we have to do at pre- to be erroneous. The phenomenon, to which we especially plain, even if the air were annihilated, is altogether under sent; and it is remarkable that the extraordinary results, to allude, and which merits the appellation of the second different circumstances. There is no goal before it, to hich it leads, have been, so far as we know, entirely over- “ Mechanical Paradox,” we shall here notice in the words which it is drawn by attraction or gravitation. There Looked by writers on roads and railways. These results, in of the Northern journalist ; to which we shall subjoin a is simply a machine of a limited power; and until we deed, have an appearance so, paradoxical, that they will shock few remarks of our own, suggested
by a cursory reading. can believe that indefinite and similar effects can result the faith of practical men, though the principle from which they flow is admitted without question by all scientific
The principal part of the article consists of calculations from definite and dissimilar causes, we cannot believe the Dechanicians.
respecting the respective resistance of bodies moving on proposition, that the velocity of a locomotive machine, 6) Fisst, It follows from this law that, abstracting the ordinary roads, in a fluid, and on rail-roads.
under the presumed circumstances, would increase“ beresistance of the air, if a car were set in motion on a level ailway, with a constant force greater in any degree than the opinions of eminent mathematicians, are stated, one On the subject of friction, certain results, deduced from yond any assignable limit.”
As we have always professed ourselves inimical to gamzith a motion continually accelerated, like a falling body of which (4) is, that "the friction of rolling and sliding bling in any shape, our only excuse, on the present occasion, ected upon by the force of gravitation, and however small bodies follows nearly, but not precisely, the same law, as must be the purpose to which we should apply the winnings, the original velocity might be, it would in time increase to yelocity; and that law is, that the friction is the same they should happen to fall to our share. beyond any assignable limit. It is only the resistance of
for all velocities." she air, increasing as the square of the velocity, that prerents this indefinite acceleration, and ultimately renders [Here follow the three paragraphs to which we have
Miscellantes. affixed the letters (a) (6) (c).) the motion uniform.' () Secondly, Setting aside, again, the resistance of the air The Mercury, in reference to these three paragraphs, the effects of which we shall estimate by and by) the very then proceeds as follows :
Two of our living poets were conversing on the actors ame amount of constant force which impels e car on a
“ Your admiration of Mrs. Siddons is so high,” said
Well might the writer in the Scotsman assert, that these Rogers, " that I wonder you never made open love to ailway at two miles an hour, would impel it at ten of facts (if such they be) will shock the faith of practical her." To that magnificent and appalling creature! I szenty miles an hour, if an extra force were employed t first to overcome the inertia of the car, and generate men. He might have added, and of theoretical men also. should bave as soon thought of making love to the Archa se required velocity: Startling as this proposition may For our own parts, while we avow our own disbelief of the bishop of Canterbury.” ppear, it is an indisputable and necessary consequence theory, we do it with all the diffidence befitting persons The Prices.-Four gentlemen of the name of Price, all
the laws of friction. In fact, assuming that the sistance of the air were withdrawn, if we suppose a
whose knowledge of such subjects has been superseded by of very different dimensions, are members of a literary prizontal railway made round the globe, and the ma- other and more urgent speculations ; and if we are mis- society, and are thus distinguished by the other meinbers:
the tall one is called High Price, the short one, Lom sine (supplied with a power exactly equivalent to the taken in the view we take of the matter, our consolation Price, the fat one,,
Full Price, and the thin one Half iction) to be placed on the railway, and launched by must be, that we err in common with many others with Price. impulse with any determinate velocity, it would revolve whom we have conversed on the subject, who all view it or ever with the velocity so imparted, and be in truth a in the light in which it presented itself to us at first sight. After he had suffered amputation with the greatest courage,
Latour Maubourg lost his leg at the battle of Leipsic. Det of secondary planet to our globe. Now, it would be at all times easy (as we shall afterwards
If we understand aright the position which we venture he saw his servant crying, or pretending to cry, in one how to convert this accelerated motion into a uniform to question, it is, that a locomotive machine, set in motion corner of the room. * None of your hypocritical tears, notion of any determinate velocity; and from the nature on a level railway, with a constant force greater in any you idle dog," said his master ; " you know you are very the resistance, a high velocity would cost almost
as degree than is required to overcome
the friction, would glad, for now you will have only one boot to clean insteari
At the theatre one evening, whilst Munden and Fawcett always will afford facilities for communication prodiing body acted upon by the force of gravitation, and how. were dressing, the latter observing the former screwing up
velocities, therefore, above four or five miles an hour, proceed with a motion continually accelerated, like a fall. ously superior to canals or arms of the sea. Indeed, ever small the original velocity might be, would in time his face before a looking-glass, asked him if he had ere is scarcely any limit to the rapidity of movement increase "beyond any assignable limit,” provided the bottled his eyes ?” “Yes," returned Munden, “and I am ese iron pathways will enable us to command; and we pressure of the air did not act as a check to limit and now going to cork my eye-brows."
A gentleman who had neither voice nor skill, once alto our hands, than by referring to the remark of Dr. equalize the rate. pung, quoted in our last. What he states is strictly Now, if this phenomenon should happen, were the attempting to sing in company, when he had come to a con. le, that the resistance of the air, which, with the velo-mosphere abstracted, it seems natural to conclude, that it clusion, Bannister said, "Your song, sir, is like the ies and powers of traction we now commonly em- would be observable in a less degree under ordinary cir- plain, explain.”—“ Why," rejoined the wit," a devilish
small pox."-"How is that?" said the company,"ex. Leslie's Elements, p. 188, &c.; Playfair's Outlines, 1.88, have escaped the observation of practical men, who have cumstances; in which case, so singular a fact could scarcely good thing when it is over.'
During the riots in 1780, a magistrate being asked why 85. Dr. Brewster has given the results of Coulomb's ex- for years witnessed the operation of locomotive machines. he had not called upon the posse comitatus, replied, " that rimeats in a tabular form, in the article Mechanics, in his 2cxopedala
If, however, the atmosphere act as a kind of regulator | he would have done so, but knew not his address.'
STANZAS ON THE DEATH OF MADAME RIEGO.
The weary is at peace! her mortal woes
At length are ended; and she sleeps the sleep Where the long-suffering from their ills repose,
Where care finds rest and mourners cease to weep; And shall we thoughtlessly lament the close
Of her sad pilgrimage? or vainly steep
When for the stranger's land her parting sail
Grew to the fading shore from which that gale Bore her for ever; then the bitterest sigh
Broke from her heart; and her pale cheek, more pale
In all the tortures of suspense, how past
Then, trembling, think the moments fled too fast,
Each, as it glided on, might be the last
When the dire tidings reach'd her--to that strife
Oh! mourn the anguish of the widowed wife,
Whose leaves the north wind withers; so her life
The earthly relics of the wanderer rest;
Were clos'd by strangers; for the spirit drest
To seek the eternal mansions of the blest;
THE LATE REV. CHARLES WOLFE. The Belfast News Letter published the following Porn said to be from the pen of the Author of the Ode on Six John Moore :
DEATH OF MARY.
I might not weep for thee ;
That thou couldst mortal be;
That time would e'er be o'er,
And thou should'st smile no more
And think 'twill smile again ;
That I must look in vain ;
What thou ne'er left'st unsaid;
Sweet Mary, thou art dead.
All cold and all serene,
And where thy smile has been;
Thou seemest still mine own,
And now-I am alone.
Thou hast forgotten me;
In thinking still of thee !
Of light ne'er seen before,
And never can restore.
LA GLOIRE MILITAIRE.
Fare, fare thee well, thou dying Year!
Thy parting knell is rung,
With cypress boughs o'erhung.
And feast, and festal rout;
From spire and tow'r rung out.
And many a legend wild
While love exulting smil'd.
Made glad thy natal day;
Were banished far away!
The festal rout is o'er,
Peal forth, alas, no more!
And the mourner weeps alone;
That joyous, hailed thy dawn!
And the smiling babe at rest,
Or rend its sinless breast !
The infant cherub blest,
And borne to endless rest!
Beside the daisied sod;
In the bosom of their God!
But few and brief have been;
On many a fitful scene!
A sad and dismal train;
Revive to wound again!
Scarce blooms one little flower;--
In retrospection's hour!
With time before the flood !
Thy evil, and thy good!
'T may be, perchance, my last; And stranger hands the lyre may wake,
That consecrates the past. And if decreed the coming year,
Death's messenger must be; I will not shed one coward tear,
To die is to be free! Liverpool.
Que te sert de chercher les tempêtes de Mars,
Ou la gloire te mene?.
L'on trouve en son foyer.
Dęs tresors du Poctole ?
Du pied de leurs chevaux. 07 Perhaps some of our correspondents would favour wrü translation of these clever lines.
TO T. L.
Farewell, farewell; to a distant land
The waves of the ocean shall bear thee, And far away to a foreign strand,
From all that's dear shall tear thee. We've tasted together the cup of joy,
And drank deep the wormwood of sorrow; And we've learnt that the world's a glittering toy,
That dazzles—to fade on the morrow. Thy course is bound to a distant cllme,
Where no loved form is near thee; Where heavily flag the moments of time,
With no voice of affection to cheer thee. When sinking beneath that sultry sun,
No such lov'd form shall caress thee;
No parent's voice will bless thee.
But fast the moments are fleeting:
Ere our hands shall join in meeting.
Nought can chill the warm tide of affection,
Thou shalt dwell in each fond recollection. December 15, 1824.
FOR THE YEARS 1824 & 1825.HE ANNALS of SPORTING, and FANC ing Subjects,
published on the 1st of every Month, price 254 The Proprietors, on the approach of a new Year, leave to call the public attention to the increasing celebri of this popular Work, the forthcoming Number of which I be published on the 1st of January) will begin a new volus and be embellished with Two capital Engravings, viz. 1. A fiue Plate of the Alpine Mastiff,
by Landseer. 2. A beautiful Plate of Snipe Shooting, from a Draukti Fielding.
The general plan of this work is so well known to t! Sporting World, that it is only necessary for the Propriet to state that it will continue to be conducted on its prese liberal scale with respect to paper, print, and
illustratica and that no pains or expense win be spared to render every way worthy of the public attention. The Sixth lume, which is just completed, contaifis a variety of Orie Communications, from different parts of the Kingdon, Hunting, Cocking,
Sailing. Accompanied with the Racing Calendar, &c. The Wa complete, for the year 1824, forms Two Volumes, Price ) each, handsomely half-bound.
The Embellishments to these Volumes comprise a fine graved Portrait, by Landseer, of a Cross between the and Fox, from a subject in the possession of Lord Cran Five Fox-hounds, Portraits, of the Hatfield Hunt; a beauti Engraving of Jerry, the
winner of the Doncaster St. La from a Painting by Herring:
a Perspective Elevation of Grand Stand at Doncaster; plans and surveys of Doncast and other principal Race Courses; Portraits of the Are Fox, Scotch Terrier, &c.
London: Printed for Sherwood, Jones, and Co. Patern ter-row,