A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 221
resents an increased removal of the same kind; 3, onestill farther advanced. Sometimes it happens that each alternate plane of acrystal grows at the expense of the adjacent one, givingrise to hemihedral) or half-sided crystals, as is shown inMg.ll8, which represents the tetrahedron, arising in Fig.… … this manner from the octahedron by the growth of eachalternate face. 1. The octahedron partially modified ;2. The change farther advanced; 3. The tetrahedroncompleted. The angles of crystals are measured by goniometers,Fig. 1T9. of which there are sever- al kinds; as the commongoniometer, and…
Chemistry · Physics
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