Chemistry and Physics. 117 
black powder which is a good conductor of electricity, though mixed with 
much acid tantalate of soda. When ignited in the air it oxydizes to tan- 
res slowly dissolves the metal with evolution of hydrogen. A mixture 
) — and fluobydric acid quickly dissolves the metal with evolution of 
a : 
yield 
d be d 
result of the first and eleventh analyses, which exhibit a close correspond- 
ence between the quantity of oxygen found and that calculated from the 
amount of chlorine. According to these results the composition of the 
d and oxyd in parts per cent is 
Tantal 49°25 Tantalum, 81:14 
Chlorine, 50°75 Oxygen, _ 18°86 
100°00 100°00 
