Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 175
4. 5 … 2R connects the vertical solid angles. The lateral axes connect thecentres of opposite edges. The interfacial angles formed at the terminal edges X are allequal to each other. This angle is one of the most importantcharacters of the rhombohedron, and we shall call it the rhombo-hedral angle, and…
Matter · Heat
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