arbons, viz: that 
it remains; 
efficie 
Ex 
cep ce of ie 
boiling- ~ ih - aE 
to b hea 
<a this, I proceed 
a 
a ade . abe temperature, I place upon 
seve -* stand, a screen of felt or thick woolen paper, 
| edes with a hole in the center about two 
vee! screen extends several inches from the 
he 
temperature, th 
per 
