Principles and Applications of Chemistry: For the Use of Academies, High-schools, and Colleges: Introducing the Latest Results of Scientific Discovery and Research, and Arranged with Special Reference to the Practical Application of Chemistry to the Arts and Employments of Common Life

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Ivison, Phinney, Blakeman & Company, 1872 - 515 páginas
 

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Página 336 - This is strikingly shown in an alloy called the " fusible metal," which is composed of 8 parts of bismuth, 5 of lead, and 3 of tin, and melts at 203° F.
Página 182 - ... is, they contain the same elements, carbon and hydrogen, in the same proportions.* " The crystallized part of the oil of roses, the delicious fragrance of which is so well known, a solid at ordinary temperatures, although readily volatile, is a compound body containing exactly the same elements, and in the same proportion, as the gas we employ for lighting our streets.
Página 277 - The heat in the immediate adjacency is intolerable, and you are drenched by the vapour, which impregnates the atmosphere with a strong and somewhat sulphurous smell. The whole scene is one of terrible violence and confusion — the noisy...
Página 152 - One end of the solenoid coil is connected with the positive, and the other with the negative pole of the...
Página 95 - Liquids, in general, being boiled in open vessels, are subjected to the pressure of the atmosphere. The tendency of this pressure is to prevent and retard the particles of water from expanding to a sufficient extent to form steam. Hence, if the pressure of the atmosphere varies, as it does at different times and places, or if it be increased or diminished by artificial means, the boihng point of a liquid will undergo a corresponding change.
Página 186 - The most convenient, and under ordinary circumstances the most economical method which can be adopted is, to expose to heat in a retort, or flask furnished with a bent tube, a perfectly dry mixture of equal parts of chlorate of potash and black oxyd of manganese. A common Florence flask will serve for this purpose, but a flask constructed of sheet copper and fitted with a small lead tube and screwcap, is preferable.* A spirit-lamp affords sufficient heat to effect the chemical decomposition, and...
Página 182 - Each figure is composed of eight white and eight black squares, but though the absolute number is the same, the grouping is different. In a one and one, in b two and two, in c and d four and four * Two conditions of isomerism may be noted ; one in which the absolute number of atoms, and consequently the atomic weight of the compound, is the same; the other where, though the relative proportions of the elements are the same, the absolute number of atoms of each is different.
Página 506 - Animals whose respiratory organs are small and imperfect, and which, therefore, consume but a comparatively small amount of oxygen, possess a bodily temperature but little elevated above that of the medium, in which they live ; animals, on the contrary, whose lungs are , large in proportion to their bodies, and respire frequently, possess the highest bodily temperature.
Página 151 - No elementary substance can be an electrolyte : for from the nature of the process, compounds alone are susceptible of electrolysis. 2. Electrolysis occurs only whilst the body is in the liquid state. The free mobility of the particles which form the body undergoing decomposition is a necessary condition of electrolysis, since the operation is always attended by a transfer of the component particles of the electrolyte in opposite directions. Electrolysis is necessarily a process of electrical conduction,...
Página 438 - If the process has failed, putrefaction takes place, and gas is evolved, which will cause the ends of the case to bulge, so as to render them convex instead of concave. But the contents of those cases which stand the test will infallibly keep perfectly sweet and good in any climate, and for any number of years. If there be any taint about the meat when put up, it invariably ferments, and is detected in the proving process.

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