d72 Scientific Intelligence. 



spectrum, some observations were made with plates containing 



of half a minute, ami other- \ari..,i- tin,,.. .weudinu'to half an 

 hour. The 411a. Iniplc -roup was 1.0I affect,,! in ihe way observed 

 by M. Corn u, from which fart it would appear that the division 



nfMinrruU ami Mocks.— M. Th 



• of heat represented by ;U (.'., from a constant sou 

 hrough a thickness of 0-oi"""; this thermal resistai 

 inversely proportional to the conductivity of the si 



