— 
F. M. JAEGER, “ON THE SYMMETRY OF THE RONTGENPATTERNS OBTAINED WITH 
SYSTEMS OF CROSSING LAMELLAE, AND ON THE STRUCTURE OF 
PSEUDO-SYMMETRICAL CRYSTALS” 
Fig. 1. 
Rontgenpattern of a muscovite-lamella parallel to (001) 
Pig. 2 Fig. 3. 
Röntgenpattern of a System of muscovite-lamellae Rontgenpattern of a System of muscovite-lamellae 
crossing at 009, crossing at 450, 
Proceedings Royal Acad, Amsterdam, Vol, XXII. Hellotype, Van Leer Amsterdam. 
