EXPLANATION OF PLATE 19. 



Fig. 1. — Linarite. Twinned on orthopinacoid. Orthographic projection on 

 base. Cerro Gordo. 



Fig. 2. — The same. Clinographic drawing. 



Fig. 3. — Caledonite. Cerro Gordo. 



Fig. 4. — Brochantite. Cerro Gordo. 



