A dictionary of arts, manufactures, and mines, Volume 11867 |
Parole e frasi comuni
acetic acid alcohol alkali alkalimeter alloy alum alumina aluminium ammonia aniline antimony arsenic beer bismuth bleaching blue boiling bore bottom brass Brazil wood bread bricks bronze carbonic acid cent chloride clay cloth coal colouring matter contains cooling copper crystallised cupel cwts cylinder diameter dissolved distillation ditto dough dyeing employed feet fermentation flour furnace gallons gluten grains ground heat hydrochloric acid hydrogen inches iron kier lime liquid liquor machine madder malt manufacture metal mixed mixture mordant mould muriatic nitric acid obtained operation oven oxide passing pieces pipe placed plate portion potash powder precipitate printed produced proportion pure quantity quarts roller sal ammoniac salt screw silk silver soda soluble solution specific gravity starch steam substance sugar sulphate sulphuric acid surface temperature tube vessel vinegar washed weight wheel wood wort yeast yellow zinc
Brani popolari
Pagina 28 - A name is a word taken at pleasure to serve for a mark which may raise in our mind a thought like to some thought we had before, and which being pronounced to others may be to them a sign of what thought the speaker had before in his mind.
Pagina 261 - All these things being considered, it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, movable particles, of such sizes and figures, and with such other properties and in such proportion to space as most conduced to the end for which he formed them...
Pagina 261 - He formed them; and that these primitive particles, being solids, are incomparably harder than any porous bodies compounded of them, even so very hard as never to wear or break in pieces — no ordinary power being able to divide what God himself made one in the first creation.
Pagina 262 - ... the thought. But if we limit the subject, by taking a given volume of any gas, we seem persuaded that, let the divisions be ever so minute, the number of particles must be finite ; just as in a given space of the universe, the number of stars and planets cannot be infinite.
Pagina 262 - When any body exists in the elastic state, its ultimate particles are separated from each other to a much greater distance than in any other state; each particle occupies the centre of a comparatively large sphere, and supports its dignity by keeping all the rest, which by their gravity, or otherwise, are disposed to encroach upon it, at a respectful distance.
Pagina 262 - In all chemical investigations. it has justly been considered an important object to ascertain the relative weights of the simples which constitute a compound. But unfortunately the enquiry has terminated here; whereas from the relative weights in the mass, the relative weights of the ultimate particles or atoms of the bodies might have been inferred, from which their number and weight in various other compounds would appear, in order to assist and to guide future investigations, and to correct their...
Pagina 261 - ... the nature of things depending on them would be changed. Water and earth composed of old worn particles and fragments of particles, would not be of the same nature and texture now with water and earth composed of entire particles in the beginning. And therefore that nature may be lasting, the changes of corporeal things are to be placed only in the various separations and new associations and motions of these permanent particles...
Pagina 262 - Chemical analysis and synthesis go no farther than to the separation of particles one from another, and to their reunion. No new creation or destruction of matter is within the reach of chemical agency. We might as well attempt to introduce a new planet into the solar system, or to annihilate one already in existence, as to create or destroy a particle of hydrogen. All the changes we can produce consist in separating particles that are in a state of cohesion or combination, and joining those that...
Pagina 405 - ... twenty minutes. It is not, however, merely a saving of time that is gained by the use of the rolling press, the paper is made smoother than it would have been by beating, and the compression is so much greater, that a rolled book will be reduced to about five-sixths of the thickness of the same book if beaten. A shelf, therefore, that will hold fifty books bound in the usual...
Pagina 605 - Dry the paper cautiously at a distant fire, or else let it dry spontaneously in a dark room. When dry, or nearly so, dip it into a solution of iodide of potassium containing 500 grains of that salt dissolved in one pint of water, and let it stay two or three minutes in this solution.