Analyfts of the Air. 197 
Experiment LXXX. 
Iput into the bolthead b (Fig. 34.) 16 cu- 
bick inches of Sheeps bloody with a little 
water to make it ferment the better. I 
found by the defeent of the water from ^ 
to y that in 1 8 days fourteen cubick inches 
of air were generated. 
Experiment LXXXI. 
Volatile Salt of Sal Ammoniac y placed in 
an open glafs ciftern, under the inverted 
glafs z z, a a (Fig. 35.) neither generated 
nor abforbed air. Neither did feveral other 
volatile liquors, as fpirits of Harts-horn, fpi- 
ritsof Wine, nor compound Aquafortis, ge- 
nerate any air. But Sal AmmoniaCy Sal 
Tartar y and fpiris of Wine mixed together, 
generated 26 cubick inches of air, two of 
which was in 4 days refprbed, and after that 
generated again. 
Experiment LXXXII. 
Half a cubick inch of Sal Ammoniac y and 
O I doubly 
