Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 186
a; bit. -^i{a:b:c). - i C ! * ! C). The most important hemihedral form of this system is therhombic sphenoid, Figs. 147, 148. It may be developed by ex-tending the alternate planes of the rhombic octahedron, Fig. 146.If we extend the shaded planes, we obtain the positive sphenoid.Fig. 147 ; and if…
Matter · Heat
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