So 
b | . 
latter figure only the outlines, not the faces of the different 
horizontal individuals, are shown, nor do the numerous vertical 
attachments present appear either in this figure or in fig. 
Occasional instances of three prisms, crossing at right angles 
like the axes of a rectangular system, were observed, and also 
4 single instance of the form represented in fig. 9 where each 
of the arms showed a domatic face. The most striking feature 
of all but the last of these different forms is the invariable 
pening at the point of union or intersection, as shown in the 
gures, 
fe) 
s 
5 
— 
tS 
© 
o 
© 
Ss 
% 
S 
ie) 
S 
assumed specific gravity, 2°65, the true specific gravity of the 
mineral becomes 7°400. 
I EB 
Ae oe a 71°18 Lose 
Cia Cea nse cms Vad etapaaons Mae # oes pee 
| ee ae eee tee Sata 0-08 eu : 
One oe 0°39 oie 
Pee ee 22°96 22°69 
O66 oe ie 4°37 4°20 
Ne ope Se Ot O19 
