$34* Mr. Hatchett's Experiments on Zoophytes, 



To the filtrated liquor, carbonate of potash was added, and 

 precipitated a large quantity of carbonate of lime. 



Flustrafoliacea. 



When this was immersed in very dilute nitric acid, an effer- 

 vescence of short duration took place; and, when this had 

 ceased, the Flustra appeared like a finely reticulated membrane, 

 which retained the original shape. 



Pure ammoniac being added to the filtrated solution, pro- 

 duced a slight precipitate; which, being dissolved in acetous acid, 

 was proved, by acetite of lead, to be phosphate of lime. 



Solution of carbonate of ammoniac was then added to the 

 liquor from which the phosphate of lime had been separated, 

 and produced a copious precipitate of carbonate of lime. 



When the Flustra foliacea was exposed to a low red heat, in a 

 crucible, it emitted a smell like burned horn, but retained its 

 shape, by reason of the carbonate of lime with which it was 

 coated. The Flustra thus burned, when dissolved in dilute nitric 

 acid, deposited some animal coal; but, in other respects, the 

 present solution resembled the former nitric solution of this 

 substance when in a recent state. 



The Flustra foliacea, when long digested with boiling distilled 

 water, communicated to it a pale brownish tinge. Infusion of 

 oak bark being then poured into the liquor, did not produce any 

 visible effect, even after 24 hours had elapsed ; but nitro-muriate 

 of tin formed a white cloud, in the space of a few minutes. 



Corallina Opuntia. 



This being put into very dilute nitric acid, produced (like the 

 Flustrafoliacea) an effervescence of short duration. 



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