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The First Volume being now complete, purchasers are informed that cloth covers, with a handsome an
suitable design, may be procured of the Publishers, or through any Bookseller.
THE “ INFORMATION FOR THE PEOPLE,” published in 1833-4, consisted of fifty sheets in large quarto,
They have therefore respectfully to announce, that the issue of AN EXTENDED AND IMPROVED
OF NUMBERS IN THE NEW SERIES, AS NEARLY AS IT AT PRESENT CAN BE GIVEN.
Astronomy, or System of the Universe. Political Economy.
Education, Practical Directions on.
History of the Bible, and Evidences of French Grammar.
Arithmetio interest Tables
History of the Church and Religious Measurement-Laud Surveying.
Drawing and Perspective.
Painting and Sculpture Engraving.
Art of Printing.
Public and Social Duties of Life. Architecture.
Manufactures of Silk, Cucton, Linen,
llorses and Cattle.
Pigs, Poultry, Pigeons, Cage Birds.
kitchen and Flower Gardening. Van Diemen's Land-New Zealand.
Trees Forests Orchards.
Mollusca and Zoophytes. Gymnastic Exercises
In Door Amusements
Chronology, &c. &c.
Published by W. and R. CHAMBERS, Edinburgh: W. S. Orr and COMPANY, London ; W. Curry, Jun. and Co., Dubuni
and sold by all booksellers who usually supply Chambers Journal.
INFORMATION FOR THE PEOPLE.
CONDUCTED BY WILLIAM AND ROBERT CHAMBERS, EDITONS OF CIAMBERS'S
EDINBURGII JOURNAL, EDUCATIONAL COURSE, &c.
NEW AND IMPROVED SERIES.
MATTER AND ITS PROPERTIES.
Natural Philosophy is a term of wide import, and lias bodies may liave the same volunie, but possess very
Animalcules-that is, animals which are so small as to be invisible to the naked eye, and which, by means
of microscopes, are seen floating in water-are in some Matterấor that of which all bodies are composed cases so minute, that it would require a million of them whose existence is made known to us by means of the to form the bulk of a grain of sand. As these animalsenses or by the test of philosopliic experimentis pos- cules possess, in every case, a perfect organisation to sessed of various properties, some of which are essential enable tliem to perform all the functions of life, tlie to its existence, while others are only accidental or con- smallness of their different parts, and the extreme tingent. The essential properties of matter are Im. minuteness of the particles of matter which compose penetrability, Extension, Figure, Divisibility, Inertia, them, are too exquisite to be made the subject of caland Attraction.
culation: the imagination is lost in the contemplation Impenetrability is that quality of bodies, in virtue of of their wonderful economy. The effuvium or odour which each occupies a certain portion of space, and ex- which excites the sensation of smell, consists of an includes other bodies from existing in the same place at calculable number of particles of matter floating in the the same instant. In the usual sense, we call any hard atmosphere, and so minute as to be altogether invisible body, such as a stone, impenetrable, because it firmly to the eye. These particles are not more remarkable resists our efforts to pierce it. But as it is understood for their inconceivably small size than for the length philosophically (although we can condense, pierce, and of time which they will remain in suspension in the remove the greater number of them), all bodies are atmosphere, or in connexion with some particular place. alike impenetrable, because they equally possess the The efHuvium given forth by a single grain of musk has property of excluding other substances from the spaces been known to perfume a large apartment for twenty which they occupy. This, in fact, is saying no more years, and yet at the expiry of that period there was no than that two things cannot be in the same place at sensible diminution of the little mass of matter from once, which is a self-evident truth, whether we apply which the smell had proceeded. it to a single particle of matter or a large mass.
The diffusion of particles of matter invisible to the or portion or particle of matter, pos naked eye, is also obvious in the case of the melting of sesses a certain extension or magnitude. It is impos- a piece of sugar in our tea; the solid mass of the sugar sible to form a conception of matter, however minute disappears, and the particles of which it was composed may be the particle, without connecting with it the idea are diffused in the liquid. There is a similar diffusion of its having a certain bulk, and filling a certain extent of particles of salt in the ocean. When we look through of space. In common phraseology, we express this pro- a glass full of sea water, we perceive that it is pure and perty of bodies by the word size or volume.
linipid; but if we pour the water into a vessel on the The next property demanding our attention is the fire, and boil it, we shall at length discover that, while figure of bodies. Figure or form is the result of ex- the liquid has escaped in the form of vapour, the par. tension, for we cannot have the idea of a body possess- tieles
of salt it held in solution remain incrusted on the ing lengths and breadth, without its having some kind vessel. of figure, however irregular. The volume of a body Particles of matter are never destroyed or lost, allas no relation to its figure: Bodies which have the though they may disappear from our immediate obsersame figure may possess very different volumes ; and Ivation. Under certain circumstances, the particles may