222 Discovery of Columbite in‘ Chesterfield, Mass. 
heat of the seta when globules of metallic tin made 
their appearance. 
© another portion of. the muriatic solution, (2. ) ren- 
pad neutral by ammionia, was added oxalate of ammonia: 
ight cloudiness was pérceptible, and aRer several days a 
final precipitate collected at the acts of the solut 10n ; —- 
we indicating the presence of lim 
. The remainder of the <ciauel muriatic solution, (2.) 
was a Searinae by the cautious use of ammonia, and to it 
was added succinate of ammonia; a copious precipitate of 
a iron made its appearanc 
“he: Lee from which the j iron had been thrown 
acid (6.) was boiled with an excess of carbonate oO soda, 
which occasioned a precipitate of oxide of man 
white: precipitate, insoluble in muriatic Meh Me 4) 
was thoroughly boiled with warm water. A portion ’of.it 
was digested in aqua ammoniz; the liquid, after having been 
passed through the filter, was saturated with muriatic acid, 
without producing’ any cloudiness. Therefore it was infer- 
red, that no Nee exists in the mineral under examination. 
9. I' then engaged in the following examination of the re- 
spainidees oft scapes precipitate, (2.)in which I took the great- 
ér interest, f er before having had it in my power to re- 
peat any of thie 2 - periments that have been made upon th 
compounds of columbium, on account of the rarity of that 
