J. Wyman on living organisms in heated water. 153 
can be 
dduced 
_, SEcTIon I. Thermal Springs.—The study of organisms living 
_ in thermal waters is of great importance in connection with the 
Begetion of the limit of vital resistance. Having become 
‘ ; 
such organisms may be su posed to live under circumstances 
the most favorable possible, for sustaining life at a high temper- 
It is a well known physiological a living beings 
ORS Fic A SU Rte LINED NAG OF TEESE a | eee te ey ee ae 
life b 
been Sustained. In the thermal waters therefore which give us 
‘Tange of temperature as high as 212° F., we are more likely 
to find the highest degree of heat consistent with the main- 
tenance of life than in our flasks. The following accounts from 
different observers have been selected as giving the highest tem-. 
. nt 
of conditions is relatively violent and therefore liable to destroy 
y its sudd 
* — in them has been ascertained. Ce 
- ings of Luzon.—These springs were examined by Son- 
nerat* and his ee of them is often quoted as evidence that 
mission to China examined them, and “saw no fish, but a 
