Analyfis of the Air. 257 
Which place an affiftant held his finger on 
mofl: part of the time; but the languid pulfe 
was quickly accelerated, fo as to beat faft 5 
foon after I dilated the lungs much, by 
preffing hard upon the bladder, efpecially 
when the motion of the lungs was promoted 
by preffing alternately the Abdomen and the 
bladder, whereby both the contradion and 
dilatation of the lungs was increafed. 
And I could by this means roufe the lam 
guid pulfe whenever I pleafed, not only at 
the end of every 5 minutes, when more air 
was blown into the bladder from a man's 
lungs, but alfo towards the end of the 5 
minutes, when the air was fulleft of fumes. 
At the end of the hour, I intended to try 
whether I could by the fame means have 
kept the Dog alive fome time longer, when 
the bladder was filled with the fumes of burn- 
ing Brimftone: But being obliged to ceafe 
for a little time from preffing the air into 
his lungs, while matters were preparing for 
this additional Experiment, in the mean time 
the Dog died, which might otherwife have 
lived longer, if I had continued to force the 
air into his lungs. 
Now, tho* this Experiment was fo fre- 
quently difturbed, by being obliged to blow 
S more 
