430 Scientific Intelligence. 
sis (1), after the separation of the silica, the alumina and ferric 
oxide were separated from the magnesi ammonia, with the 
d 
by ignition until the weight was constant, and each is represented 
by three distinct determinations; name y, the weight of the silica, 
e determination of the water was the only difficulty which 
the analysis of this mineral presented. It is by far the most 
x) H 
3758 1973 595 058 2513 11°09=100°06 
Qa) 20°04 919 178 014 &10°05 9°86 
$e Ne tl 
20°04 10°97 10°19 9°86 
2°03 Ill 1:03 3 
37°43 19°75 5°95 O88 25°58 11°09=-100°38 
(2) 19°95 920 178 014 10°38 . 
et | 
19°96 10°98 10°37 9°86 
2°03 1-11 1°05 _ 
3710 20°22 5:95 O58 25°07 11°09=100°01 
(3) 19°79 942 1°78 0714 10°03 9°86 
2 cee ee 
oes 19°79 11°20 10°17 9°86 
2° Lis 1°03 1° 
