p421_1)
Vergl. die Figuren 1 bis 4 Tafel VII, welche die complicirteren Combinationen darstellen, und Fig. 5, die eine Projection sämmtlicher Flächen nach der Quenstedt'schen Methode giebt.
p431_1)
Hr. Pastenr hat zuerst die Bemerkung gemacht (
Ann., chim. phys.
t. XXII,
p. 276), dass in dimorphen Körpern fast immer solche Winkel vorkommen, welche gewissen der andern Form sehr nahe stehen.
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