Till. MEASUREMENT "i CRYSTALS 



159 



parametrr- .it' y arc oo &: 5:40 and its indices arc (041). The 

 parameter- and indices of any other form occurring on the er\-tal 

 may l>e deiennined in a similar \v:iy, and with the data obtaine.l 

 the irv>tal may he dra\vn, by consulting the chapter on the 

 drawing of crystals. 



