B ta) 
A AND F. M. JAEGER: THE SYMMETRY OF THE RONTGEN-PATTERNS PLATE V. 
OF MONOCLINIC CRYSTALS. 
WE 
Fig. 17. 
Amphibole. Plate parallel to (001). Fig. 18 
Augite. Plate parallel to (100). 
Fig. 19. Fig. 20. 
Augite. Plate parallel to (010). Augite. Plate parallel to (001). 
Acad. of Sciences, Amsterdam XVIII Ao 1915/1916. HELIOTYPE, VAN LEER, AMSTERDAM. 
