55i) 



Bulletin de l'^cad^inie Impériale 



560 



Messungcn der Aragouit-Krystalle von Biliu (Bohmen). 



a:l):c= 1,15763: 1,60657: l(a Verticalaxe , b Maki-odiagonale , c Brachydiagonale), 



h = ~P~, h = ~r<N>, c = or, M = r~, x =- if ~, k = P~, ^ =. |P~, i = 2P~, V = 3P~, 



e = 5P~, g = 6P~, Jf^c^P, 2J = P, « = P2, s — 2P2. 



