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CHEMISTRY. 



CHYMISTRY. Philosophy by Fire. (Johnson 

 from Arbuthnot.) 



Various Definitions of Chemistry. 



1. The study of effects produced by heat and 

 mixture. 



2. The study of the effects of heat and mixture, 

 with the view of discovering their laws. 



S. The science which teaches the knowledge of 

 the intimate and reciprocal action of bodies on one 

 another. 



4. The phenomena resulting from the operation of 

 attractions and repulsions at insensible distances, con- 

 stitute the proper objects of chemical investigation.* 



The Chemistry of Nature. 



The art of man does nothing more than bring 

 things nearer to one another, or carry them further 

 off; the rest is performed by nature, and generally 

 by means of which we are ignorant. 



Operating Causes. 



From the exertion of two powers, heat and conti- 

 guous attraction, arise the actions which are arranged 

 under the science of chemistry. 



* No definition of this science has yet been invented of such 

 logical precision as to be entirely free from objection ; partly 

 owing to its being of so comprehensive a nature, that it is impos- 

 sible to say where it begins, or where it ends. 



