be 
ANOTHER ounce being calcined in a white heat for about one 
hour loft 200 grains of its weight, and on repeating this experi- 
ment I found the lofs amouint to 199 grains. 
LasTLy, on the 281 grains which remained after this experi- 
ment I poured dilute marine acid, and found the quantity of 
fixed air to be 106 grains. 
Hence I deduce the weights of the feveral fubftances diffipated 
by the calcination of an ounce of the infoluble refiduum of the 
barilha. 
ift, The weight of the fixed air loft was 125,5—106=18,5 
grains. 
2dly, The lofs of moifture was 38 grains. 
3dly, The lofs of the fixed air and moifture amounted toge- 
ther to 56,5 grains. ‘This deducted from the intire lofs, that is 
from 199 grains, gives the lofs arifing from the combuftion of 
the charcoal, and confequently its quantity, 199—56,5=142,5 
grains. 
I next proceeded to examine the fixed incombuftible part that 
remained after the above calcination. On the 279 grains of this, 
which remained after the calcination of an ounce of the infoluble 
part, [ poured a quantity of diftilled vinegar, whofe {pecific gra- 
vity in the temperature of 62° was 1,008, and digefted that refi- 
duum therein for fixteen hours in a heat little more than 100°. 
After edulcoration and deficcation I found the weight of what 
remained undiflolved to amount to 63 grains. Upon this expe- 
riment 
