G. J. Brush on Sussevite. 1 
confirmed the water determination made by the above method, 
The boric acid was determined by Stromeyer’s method as bon- _ 
fluorid of potassium. The results of the analyses are:— } 
L & } 4, 5. 6. Mean. Oxygen 
Bori ot thes oka deseo lle ay eS 
Manganousoxyd,... 40°08 40°20 40°01 wed soapde: ., calms = at 
MagrieSia, oo. a Mies 16°96" Pa seo ne LS 
MOG 505 cr ceca Sous --.- 964 9°53 959 883 
eo 
: 
j 
ma, 
water is replaced by manganese and magnesia, and we MY 
write for its formula cite Mg)++1)*B, or if the water be not a 
ronsidered basic it may be represented by (ita, Me)"B+E 
lieve to be the correct view of the composilion® 
| = some of its physical and chemical characters sussex : 
rous borate 
: the oxy 
One variety analyzed by Stromeyer ee jncludilg 
water of 17 : 181, or nearly 1:1, requiring but a slight ee : 
* Dana’s Mineralogy, 5th ed-, p. 593. 
