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In reading Logic the compartments will greatly assist you, if you associate the parts of each chapter with them. We will take for Example the divisions of a Proposition.

A Proposition has four species enumerated ; i. e. the exclusive, exceptive, comparative, and inceptive or desitive.

As this is a thing which we do not want to call forth in any particular succession, as the 10th, 15th, &c. as in Chronology, or Botany, we may begin with any square of either of the Walls instead of the Floor.-I advise the Wall that fronts you, which will always be your second; then in the ceiling number of that Wall, (20) put the explanation of the Proposition. In the 21st square will be placed the exclusive part-in the 22d, the exceptive--in the 23d, the comparativeand in the 24th, the inceptive or desitive; and any thing else that concerns this chapter may be put in the following squares according to the judgment of the Student, — A little practise will make it very easy.

Let me again remind you not to look continually at the book (for if you do there can be no association between the eye and the place of locality) but take a mere glance at the book, and catch as much at a time as you can contain for the moment, and look steadfastly towards the square and repeat it till you are perfect.--You may be assured that

eye and

there is as strong an association between the
the place of locality, as there is between the ear
and any note in Music; only people in general are
total strangers to the former, while many are fa-
miliar with the latter ; and the reason is because
the association of objects and ideas, with the loci
of places, have never been taught by any of the
Schools to be put into practise; but was this mode
to be adopted it would save much time and trouble,
in the prosecution of many laborious studies.

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The names of the classes and orders in Botany may be learned in a few minutes. Look to the 1st square, and pronounce Monandria—2d, Diandria, &c. The word joined to the class contains the number of orders in each. This being once learned, you may call it forth in any order as the 5th, 10th, &c. You may recollect the 15th class immediately by fancying you see a Tea-tray hung up in your 15th

square, as the two first syllables of the one nearly agree in sound with the other. The 5th class will be remembered by seeing in the square a pen, and an ape-the pen will remind you of Pentandria, and the word ape will give you the number of orders.—To assist those unacquainted with the Greek, many other objects may be taken advantage of, to facilitate the learning these names.-Remember that the first 13 classes all end in andria.

No. Classes. Orders.

1 Monandria's doe2 Diandria's, foe 3 Triandria's, foe 4 Tetandria's, hoe 5 Pentandria's, ape 6 Hexandria's, owl 7 Heptandria's, oak,


2 3 3 4 7 5 4


No. Classes. Orders.
8 Octandria's, hoe
9 Enneandria's, wig
10 Decandria's, wine
11 Dodecandria's, wine
12 Icosandria's, oil
13 Polyandria's, wine
14 Didynamia's; ode
15 Tetradynamia's, weed
16 Monadelphia's, ear,
17 Diadelphia's,

hoe 18 Polyadelphia's, yoke 19 Syngenesia's, om 20 Gynandria's, toe 21 Monçecia's, box 22 Diccia's, book 23 Polygamia's, ägue 24 Cyrptogamia's, oil


4 3 6 6 5 6 2 2 8 4 4 5 9 10 14 3. 5

The orders are taken from Dr. Turton's System of Nature.

N.B. Whatever else concerns the systematic tables of Botany may be united to this.

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Nothing can be more easy, than to be able te refer to the different clașess of Mineralogy, by the assistance of the compartments; for these thing's being all conspicuous objects, it is only to bri before the eye of the mind all such as compose a class, into that square which gives the number of the class.

Examples.- The first class is composed of sueh bodies as will yield to the friction of a file, and such as will not yield to the friction of a file.-T, put you in mind of this class, fancy you see a file lying in your first square, and a piece of some metal, and a diamond,—the first will yield to the friction of the file, and the other will not.— The second class is known by rubbing the angular parts of one mineral, against the angular parts of another mineral- in this square then, you may fancy that you see minerals of square and triangular shapes, &c. To bring to your recollection these bodies which constitute the third class, įmagine you see a hammer in your third square; as such things that yield to the stroke of a hammer (but with difficulty) and such

as are brittle, (as glass ;) and such as are crumbling, (as chalk, &c.) belong to this class. In this manner, may all the classes in Mineralogy be associated with the different squares; and this systematic arrange, ment, prevents that confusion in the mind, which often occurs when the memory is unassisted by the imagination.

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