A System of Mineralogy: Comprising the Most Recent Discoveries

Wiley & Putnam, 1844 - 633 ページ
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113 ページ - ... is the weight of a volume of water equal to that of the mineral.
108 ページ - Rubicon on a certain occasion, and it is a contingent general truth that the sine of the angle of incidence bears a constant ratio to the sine...
550 ページ - Antimony Sb Argon A Arsenic As Barium Ba Bismuth Bi Boron B Bromine Br Cadmium Cd Calcium Ca Carbon C Cerium Ce...
75 ページ - Let a mass of matter be supposed to consist of spherical particles all of the same size, but of two different kinds in equal numbers, represented by black and white balls; and let it be required that, in their perfect intermixture, every black ball shall be equally distant from all surrounding white balls, and that all adjacent balls of the same denomination shall also be equidistant from each other.
112 ページ - The specific gravity of a mineral is its weight compared with that of another substance of equal volume, whose gravity is taken at unity.
290 ページ - In the matrass it loses its water, and becomes yellowishgreen and friable. When heated to a certain point upon charcoal, it is reduced in an instant with a kind of deflagration, leaving a globule of malleable copper, with white metallic particles dispersed throughout it, which are entirely volatile at a continued blast.
609 ページ - CARPENTER, GEORGE W. On the Mineralogy of Chester County, with an account of some of the Minerals of Delaware, Maryland and other Localities.
115 ページ - If the file abrades the mineral under trial with the same ease as No. 4, and produces an equal...
107 ページ - AE, is farther from the same perpendicular than if it had proceeded in the original direction DE. We have therefore this important principle : Light, in passing from a rarer to a denser medium, is refracted TOWARDS the perpendicular ; if from a denser to a rarer, it is refracted FROM the perpendicular.
26 ページ - An edge is beveled, when replaced by two planes, which are respectively inclined at equal angles to the adjacent faces, (fig.