101 
Museum Bulletin No. 27. 
Plate XI. 
A. Microphotograph showing drusy character of colerainite-bearing rock, magnified 
30 diameters, natural light ; Standard asbestos mine. (Page 67.) 
B. Microphotograph showing drusy character of colerainite-bearing rock, magnified 
30 diameters, polarized light; Standard asbestos mine. (Page 67.) 
