26 A TREATISE ON THE CONNECTION OF 



earthy, may be changed into the gassious state, and re-- 

 solved into their simple principles. 



By combustion in the open air, grain, carrots, pota- 

 toes, &c. &;c. yield much more alkaline salts, than- 

 straw, hay, or wood. 



Neither starch, nor the animalized matter of grain, 

 yield fixed alkaline salts, when burned separately ; hence 

 it appears, that the union of these substances is equally 

 requisite for the formation of fixed alkaline salts as for 

 sacharine matter. 



This analysis of vegetables by fire, is far from shewing 

 the true state of combination, in which the simple prin- 

 ciples of these substances existed in vegetables. The 

 acid phlegm, the empyrcumatic oil, the vegetable alkali, 



or potash, vitriolated tartar, or other neutral salts, are 



compound matters, or new combinations, produced by 

 the adion of heat, and decomposition of water, and are 



substances not only very different from those juices 



which the plant originally imbibed, but likewise very 



different from those matters found in the vegetables, after 



having 



