344 Chlorine—Radiation, &. 
from some thunderstroke, from whose effect, - experi- 
menter is happy if he escape uninjured.—Edito 
N.B. In the first experiment, related in this notice, the 
flask was not covered while filling, but it was done in an 
under-ground laboratory. where the light was imperfect : 
in the second experiment, the flask was filled in an upper 
room, when the sun shone out of doors, but the flask was 
covered by a thick towel: in the third, although in an upper 
room, it being a very dim light, no precaution was used, and 
the glass was not covered; on the other hand, there was no 
heat from any adventitious cause, nor could the effect be at- 
tributed to any thing peculiar, for we had made this mixture 
many times ior ‘under similar circumstances, without any 
explosion.— 
2, Chlorine pat heat in the skin. 
‘Communicated ina letter, dated Philadelphia, Oct 9, 1820, from Professor 
Seer a tay "Hare to the Editor.) © 
“Lfind, alee a SiMtous quelidestot Siidaeiaieasiich. 
I belive: has never been mentioned as such. The air 
around being at about 60, it produces a sensation of heat 
equal to 90 or 100, on immersing the hand in it, though the 
_ common thermometer should not be affected when im- 
mersed. e ial thermometer shewed the gas 
warmer; but the effect thus indi was too small 
to have hand, and possibly may arise from 
action aie ce, between the gas and the insensible per- 
spiration of e skin, as the — of chlorine in 
ing animal oltre. well known. 
<3 Radiation bd Heat through Glass. 
