314. ESSAYS anp OBSERVATIONS 
minutes paft nine (viz. twenty five mix 
nutes after the frog was taken out of the 
folution of opium) the heart feemed to 
have recovered more life; for it perform- 
ed erght pulfations in a minute: The con= 
tractions of the auricle now became fee- 
bler, and were {care more numerous than 
thofe of the heart, but always preceeded 
them fome little time. Six minutes be- 
fore ten, this heart moved only fix times: 
in the minute. Twenty four minutes paft 
ten it made only five pulfations in fixty é 
five feconds, the firft, third, and fifth of 
which pulfations were after an interval of 
fifteen feconds, and the fecond and fourth 
after a paufe of ten feconds. Seventeen 
minutes before twelve, and two hours and 
twenty eight minutes after the frog was 
taken out of the folution of opium, its 
heart moved only thrice in feventy five 
feconds, and performed its /yffole very 
flowly. Before two o'clock afternoon the 
heart was quite dead; but how long, I 4 
cannot fay, not having had leifure to ob- — 
ferve it from a quarter before twelve to ‘ 
near two. 
7, AFTER & 
