Vegetable and Animal Earths. 155 

 perfect lixiviation. He alfo found fometimes 

 animal Earth, (that is phofphoric felenite,) in 

 afhes. The Earth remaining after the putrefac- 

 tion of vegetables, is exactly of the fame nature. 

 Sch<zffer> i 72. Mr. Morveau found the afhes 

 of fome vegetables to contain 97,5 per cent. 

 of calcareous Earth, the remainder magnefia. 

 Mr. Berniardy Mr. D' Arcet^ and Mr. Achard, 

 have had nearly the fame refults. 1 9 Roz. 52. 



The neutral falts moft ufually found in 

 afhes, are tartar vitriolate, glauber's fait, 

 common fait, digeftive fait, and felenite, alfo 

 hepar fulphuris ; according to Model a pound 

 of rhubarb contains an ounce and a half of 

 felenite. 



Hence we fee why clay is fo unfavourable 

 to vegetation, and how calcareous Earth i$ 

 introduced into the bodies of animals. 



Animal Earth? is obtained either from the 

 {hells of fifh, or from thofe of eggs, or from 

 pearls, or from the bones, horns, claws of 

 Jand animals, or from the {kins of i 



That obtained from the fhells of fifh and 

 from thofe of eggs, is found by repeated expe- 

 riments to be purely calcareous ; only oyfter 

 {hells difcover fome feeble veftiges of felenite. 

 Bergm, on Scheffer, 173, that obtained 



from 



