F. M. JAEGER AND H. HAGA. ON THE SYMMETRY OF THE RöNTGEN-PATTERNS 

 OF RHOMBIC CRYSTALS. I. 



Fig- 9. 

 Struvite. Plate parallel to (100). 



Fig. 10. 

 Struvite. Plate parallel to (010). 



Fig. //. 

 Struvite. Plate parallel to (001). 



Fig. 12. 

 Calamine. Plate parallel to (001). 



Proceedings of the Acad, of Sciences, Amsterdam. XVIII. A» 1915/1916. 



HELIOTYPir, VAN LEER, AMSTERDAM 



