Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 199
Fig. 187. Fig. 188. plane tn np q r s, andthen revolving one halfon the axis uniting thecentres of the two oc-tahedral faces throughan angle of 60° or 180°,and then uniting thetwo halves again bythe surfaces at whichthey were separated.Fig. 189 represents a common form of the crystals of…
Matter · Heat
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
