Plate LI 1 1. 



Fig. 1. 



Orpiment. 



mercur, utah. 



Forms: a (100), b (010), m (110), u (120) o (101), e (103), d (103), / (023) 

 v (343), v (121), 9 (149), k (123), « (133), • (243). 



Fig. 2. 



Orpiment. 



mercur, utah. 



Drawn with positive forms in front. 



Fig. 3. 



Orpiment. 



mercur, utah. 



Basal projection of forms observed. 



