CALORIC AND ELECTRICITY. 433 



guished philosophers, ancient and modern, have 

 recognized the existence of such a power. It 

 was the Ilvp KaOapaiov of Hippocrates the ^Tv^n 

 of Aristotle, or the form of forms, by which he 

 meant the cause of causes the anima mundi of 

 the Romans the archeus of Paracelsus and Van 

 Helinont the mater ia subtilis of Descartes the 

 pneumatical power of Bacon the phlogiston of 

 Beccher and Stahl the electric fluid of Frank- 

 lin, Priestley, and Beccaria the latent heat of 

 Dr. Black and the caloric of modern times. 



Analogies of Caloric and Electricity. 



All that we can possibly know of either ca- 

 loric or electricity, must be derived from a careful 

 study of their fundamental properties, as exhibited 

 in the various phenomena which they produce 

 under different circumstances. Any hypotheses 

 concerning their essential nature are beyond 

 the scope of this inquiry. 



For the sake of those who have not sufficiently 

 directed their attention to the intimate relations 

 of caloric and electricity, it may be of import- 

 ance to bring under one general view some of 

 their most striking analogies. 



It has been shewn throughout the preceding 

 portion of this work, that all the motive powers 

 of caloric are resolvable into the primary and 



F F 



