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 grainy. t. 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 empyreumatic oil, the vy egetable alkali} or potash, vitriolated tartar, or other neutral] Saltese ar

compound matters, or new combinations, produced by the action of heat, and decomposition of water, and are

substances not only very different from those juices

rn rene

Which the plant originally imbibed, but likewise very different from those matters found inthe vegetables, afte

having

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