A Journal of Natural Philosophy, Chemistry and the Arts, Volym 21–22 |
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Andra upplagor - Visa alla
A Journal of Natural Philosophy, Chemistry and the Arts, Volym 3–4 William Nicholson Obegränsad förhandsgranskning - 1802 |
A Journal of Natural Philosophy, Chemistry and the Arts, Volym 32 William Nicholson Obegränsad förhandsgranskning - 1812 |
A Journal of Natural Philosophy, Chemistry and the Arts William Nicholson Obegränsad förhandsgranskning - 1812 |
Vanliga ord och fraser
acid gas alburnum alcohol alkali alumine ammonia analysis apparatus appears azote barrel barytes boat bodies boiled calculation capstan carbonic acid carbonic acid gas circumstances coak coal colour combustion comet common composition contained copper crystals cubic inches decomposition diameter dissolved distillation Ditto Ditto electricity employed equal errour ether experiments fecula feldspar fermentation fluid grains grape heat hidrogen gas inflammable iron Journal juice less liquor machine matter meïonite ment mercury metallic method mixed mixture muriatic acid muscovado nature nearly nitric acid nitrogen observed obtained ounces oxalate of lime oxalic acid oxicarburetted hidrogen oxide oxigen gas particles phosphate pipes plate polygons portion potash precipitate probability produced proportion pyrites quantity residuum salt seeds separated silex solution species specific gravity strata stratum substance sufficient sugar sulphuret sulphuric acid supposed surface throw tion tricities tube uric acid vapour vessels weight
Populära avsnitt
Sida 77 - Ditto of 40 tons of common ditto , 20 145 Deduct the value of 70 tons of coak 93 The annual expenditure in coal, after deducting the value of the coak, and without allowing any thing for the tar, is therefore — — — 52 And the interest of capital, and wear and tear of apparatus — — 550 making the total expence of the gas apparatus, about £ 600.
Sida 145 - However, since those who are desirous of ascertaining the justness of this observation by experiment, may be deterred by the difficulties that we meet with in attempting to determine with precision the constitution of gaseous bodies, for the explanation of which Mr Dalton's theory was first conceived, and since some persons may imagine that the results of former experiments on such bodies do not accord sufficiently to authorize the adoption of a new hypothesis, it may be worth while to describe a...
Sida 145 - Next, let four grains of the same carbonate be exposed for a short time to a red heat ; and it will be found to have parted with exactly half its gas ; for the gas extricated from it in the same apparatus will be found to occupy exactly the same space, as the quantity before obtained from two grains of fully saturated carbonate. Sub-carbonate of Soda. Exp. 2. A similar experiment may be made...
Sida 144 - As I had observed the same law to prevail in various other instances of super-acid and sub-acid salts, I thought it not unlikely that this law might obtain generally in such compounds, and it was my design to have pursued the subject with the hope of discovering the cause to which so regular a relation might be ascribed.
Sida 107 - Cooper. At Guy's.— Practice of Medicine; by, Dr. Babington and Dr. Curry. — Chemistry ; by Dr. Babington, Dr. Marcet, and Mr. Allen. — Experimental Philosophy ; by Mr. Allen. — Theory of Medicine, and Materia Medica ; by Dr.
Sida 74 - ... of an ounce (175 grains) of tallow per hour. The quantity of light is necessarily liable to some variation, from the difficulty of adjusting all the flames, so as to be perfectly equal at all times ; but the admirable precision...
Sida 71 - ... measure) of cold spring water, and afterwards strain it. It would be equally practicable painting with wax alone, dissolved in gum-water in the following manner. Take twelve ounces or three quarters of a pint wine measure of cold spring water, and four ounces and a half of gum-arabic, put them into a glazed earthen vessel, and when the gum is dissolved, add eight ounces of white wax. Put the earthen vessel with the gum-water and wax upon a slow fire, and stir them till the wax is dissolved and...
Sida 71 - ... heat is applied to the picture, the greater will be the transparency and brilliancy of colouring ; but the contrary effect would be produced if too sudden or too great a degree of heat was applied, or for too long a time, as it would draw the wax too much to the surface, and might likewise crack the paint. Should the coat of wax put over the painting, when finished, appear in any part uneven, it may be remedied by drawing a moderately hot iron over it again, as...
Sida 71 - As soon as this is the case, and the gum-water and mastich are quite boiling, without taking them off the fire, add five ounces of white wax, broken into small pieces, stirring and beating the different ingredients together, till the wax is perfectly melted and has boiled. Then take the composition off the fire, as boiling it longer than necessary would only harden the wax, and prevent its mixing so well afterwards with water.
Sida 14 - Should future experiments prove the truth of this hypothesis, still the alkalies, the earths, and the metallic oxides will belong to the same class of bodies. From platina to potassium, there is a regular order of gradation as to their physical and chemical properties, and this would probably extend to ammonium, could it be obtained in the fixed form. Platina and gold, in specific gravity, degree of oxydability, and other qualities, differ more from arsenic, iron, and tin, than these last do from...