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Not only do natural bodies behave in this way, but it is possible, as shown by Brewster, to confer, by artificial strain or pressure, a temporary double refracting structure upon non-crystalline bodies such as common glass. This is a point worthy of illustration. When I place a bar of wood across my knee and seek to break it, what is the mechanical condition of the bar?
Carbon occurs in inorganic nature in two crystalline forms, the diamond and black lead, or graphite, their physical differences evidently being the result of their different molecular structure. Graphite is a good conductor of heat and electricity, and the diamond is not. Carbon in the organic world, where it plays such an important part, is non-crystalline.
The poison in this case is a white, non-crystalline solid; the poison contained in the bullet was a solution of a white, non-crystalline solid, which analysis showed to be the most poisonous of all akaloids. "The bullet was virtually a hypodermic syringe; the poison in this cigar has been introduced, in the form of an alcoholic or ethereal solution, by a hypodermic syringe.
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