THE 
EMPORIUM 
OP 
ARTS AND SCIENCES. 
Vol. 1.] August, 1812. [No. 4» 
No. 33. 
ON SPONTANEOUS COMBUSTION, 
(Continued from page 178.) 
On Spontaneous Inflammations . By C. Bartholdi*, 
Professor of Jf itural Philosophy and Chemistry 
THE name of spontaneous inflammation is given to 
that manifested in a combustible body, without its being 
in immediate contact with a body in a state of inflamma- 
tion. 
Combustion of this kind may be occasioned by differ- 
ent causes, the principal of which are : 
1st, Violent friction. 
2d, Action of the sun. 
3d, The disengagement of the caloric produced in bo- 
dies though not combustible, but brought near to com- 
bustible bodies, to which they may communicate such a 
degree of heat that they inflame by the contact of the air. 
4th, The fermentation of animal and vegetable sub- 
stances heaped up in a large mass , which are neither too 
dry nor too moist, as hay, dung, &c. 
* Tilloch. y, 18 ; p. 346 ; from the Jlnnaks de ChimU 9 No. 144. 
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