1 7a Amphibole from Lyon Mountain. Orthographic projection 

 showing forms: b (oio), m (no), e (130), t (loi), b (loi), 

 r (oii),^ (031) ands (121) 



17b CHnographic projection of same 



1 8a Zircon from Parkhurst shaft, Lyon Mountain. Orthographic 

 projection of type of larger crystals. Forms: m (no), a 

 (100), p (in), V (221) and u (331) 



1 8b CHnographic projection of same 



19a Zircon from Parkhurst shaft, Lyon Mountain. Orthographic 

 projection of type of smaller crystals. Forms: w(iio), a (100), 

 p (in) and x (311) 



19b CHnographic projection of same 



20a Epidote from Lyon Mountain. Orthographic projection on a 

 plane parallel to b (010), showing forms: a (100), c (001), 

 u (210), e (ioi)», r (loi) and n (in) 



20b CHnographic projection of same 



21 Stilbite from Lyon Mountain. CHnographic projection show- 

 ing parallel grouping. Forms: c (001), b (010) and / (10 1) 



