Miscellaneous Intelligence. 295 
much water, when they form heavy hydrocarbons, 
afford less than half the usual amount, when thus decomposed, under the 
perature, 
Any explanation of the change of composition induced in the volatile 
ay of bituminous coals under the above-described conditions should 
include mechanical pressure, which is no greater than often exists in 
- Seems probable that the presence of an atmosphere of nearly perma- 
8ases in the decomposin vessel, and the regular continuous flow of 
' Ty to convert coal into gas without the presence 
tom af Comparative Zoology in Harvard University.—Since 
_ University, he has been actively devoted, as is well known, to col- 
Yen ay eed to the study of the natural sciences, during the last 
Mi Prog apne, 2nd was in habits of intimate and cordial association 
