mineral Substance, called Strontionite . 
425 
funnel were then dissolved in distilled water, and also decom- 
posed by alkali, by means of which 68 grains of barytes were 
obtained. 
According to these experiments, 100 grains of this crystal- 
lized substance yielded by decomposition 70 grains of barytes, 
15 grains of carbonic acid, and 12 grains of calcareous earth. 
The difference of the 3 remaining grains may be accounted 
for by the water, by the small loss which was observed when 
the crystallized substance was exposed to a strong heat, and also 
from the crackling which was perceived when exposed to a 
sudden heat. Whether this crystallized substance is different 
from that specimen which Dr. Withering analyzed, or whe- 
ther the calcareous, earth escaped his observation during his 
experiments, I cannot decide, as he does not mention that he 
employed the substance in a crystallized state for his experi- 
ments * 
* The experiments newly communicated by Mr. Kir wan, and those which are 
promised to 'be communicated by Dr. Hope, will probably throw some more light on 
the nature of the Strontionite. 
31 
MDCCXCIV. 
