246 Scientific Intelligence. 
by certain parties, that the samples in question were sophisticated 
ition of refined commercial petroleum. An inquiry 
instituted privately by me has elicited from the parties immedi- 
ately concerned in its transmission only an emphatic denial of 
the charge of falsification, and if any such fraud has been per- 
petrated I am well persuaded that the responsibility falls else- 
where. My investigations in this direction are unrelaxed, an 
the truth cannot remain long concealed. 
New Haven, January 14th, 1867. 
SCIENTIFIC INTELLIGENCE. 
I, CHEMISTRY AND PHYSICS. 
principle of the equality of the radiating and absorbing powers of bodies. 
The apparatus employed consisted of a horizontal brass tube, which 
of air. A thermometer was suspended over the jet so that its tempera- 
ture could be determined with sufficient accuracy. e heat radiated 
from the jet o or vapor was allowed to fall upon one surface of a 
of the scale. When the air was passed through water the deviation re- 
mained almost the same. When dry carbonic acid gas was pa 
through the hot brass tube the deviation amounted to 100-120 divisions, 
and common illuminating gas gave nearly the same deviation. When 
air was passed through water heated to 60°-80° C. the deviation rosé 
en the water boiled so as to produce clouds in the jet of air the de- 
viation exceeded 100 scale divisions, and the same result took place when 
vapor. en no vesicular vapor was present the galvanometer gave _ 
greater deviation than 20, no matter how much steam might be 
