Conversations on Chemistry: In which the Elements of that Science are Familiarly Explained ; and Illustrated by Experiments ; and Thirty-eight Engravings on Wood

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Belknap and Hamersley, 1841 - 356 halaman
 

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Halaman ii - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Halaman 336 - Hermetically. — A term applied to the closing of the orifice of a glass tube, so as to render it air-tight. Hermes, or Mercury, was formerly supposed to have been the inventor of chemistry ; hence a tube which was closed for chemical purposes, was said to be hermetically or chemically sealed. It is usually done by melting the end of the tube by means of a blow-pipe. Hydrogen. — A simple substance; one of the constituent parts of water. Hydrogen Gas. — Solid hydrogen united with a large portion...
Halaman ii - Mrs. Marcet's Conversations on Chemistry, in which the Elements of that Science are familiarly explained and illustrated by Experiments.
Halaman v - ... imperfect knowledge of the subject. But, on the one hand, she felt encouraged by the establishment of those public institutions, open to both sexes, for the dissemination of philosophical knowledge, which clearly prove that the general opinion no longer excludes women from an acquaintance with the elements of science ; and, on the other...
Halaman 339 - Sublimation. — A process whereby certain volatile substances are raised by heat, and again condensed by cold into a solid form. Flowers of sulphur are made in this way. The soot of our common fires is a familiar instance of this process.
Halaman 47 - IN our last conversation, we begau to examine the tendency of caloric to restore an equilibrium of temperature. This property when once well understood, affords the explanation of a great variety of facts which appeared formerly unaccountable. You must observe, in the first place, that the effect of this tendency is gradually to bring all bodies that are in contact to the same temperature. Thus the fire which burns in the grate, communicates its heat from one object to another, till every part of...
Halaman 62 - Such was, from time immemorial, the generally received opinion respecting the cause of dew ; but it has been very recently proved by a course of ingenious experiments of Dr. Wells, that the deposition of dew is produced by the cooling of the surface of the earth, which he has shown to take place previously to the cooling of the atmosphere ; for on examining the te-mperature of a plot of grass just before the dewfall, he found that it was considerably colder than the air a few feet above it, from...
Halaman 39 - ... equally expanded by equal degrees of caloric. Emily. True; as there is no power opposed to the expansive force of caloric in elastic bodies, its effect must be the same in all of them. Mrs. B. Let us now proceed to examine the other properties of free caloric. . Free caloric always tends to diffuse itself equally, that is to say, when two bodies are of different temperatures, the warmer gradually parts with its heat to the colder, till they are both brought to the same temperature. Thus, when...
Halaman iv - ... friend on the subject of chemistry, and of repeating a variety of experiments, she became better acquainted with the principles of that science, and began to feel highly interested in its pursuit. It was then that she perceived, in attending the excellent lectures delivered at the Royal Institution, by the present Professor of Chemistry, the great advantage which her previous knowledge of the subject, slight as it was, gave her over others who had not enjoyed the same means of private instruction....
Halaman v - ... establishment of those public institutions, open to both sexes, for the dissemination of philosophical knowledge, which .clearly prove that the general opinion no longer excludes women from an acquaintance with the elements of science ; and. on the other, she flattered herself, that whilst the impressions made upon her mind, by the wonders of Nature, studied in this new point of view, were still fresh and strong, she might perhaps succeed the better in communicating to others the sentiments she...

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