C 5!3 ] 
in an irregular order. Tome lying acrofs others, and 
fome (landing on one end *. 
The fill fuccini generates a great degree of cold 
in the time of its laturation with the volatile al- 
kali, for it funk the quicksilver in the thermome- 
ter from 52 to 40; in this it agrees with the com- 
mon fal ammoniacum. 
The Conclufion. 
From the experiments above related, it is evident 
that phyficians have hitherto been in a great mif- 
take, in believing that all vegetable acids were 
nearly of the fame nature ; for from them it fhould 
feem that almoft each of the acids, called vegetable, 
has fomething peculiar to itfelf, and upon future 
trials may be found to have different virtues and 
properties •f'. 
The different appearance of the neutral falts 
above mentioned, from that of thofe produced by 
the union of the foffil alkali with any of the mine- 
ral acids, feems to make it doubtful whether the 
vegetable acids derive their origin from the mine- 
* Dr. Stockar de Neuforn fays, that this ammoniacal fait 
does not precipitate filver from aqua fortis, nor change aqua 
foitis into aqua regia ; and when put in a filver fpoon, and fet 
over the fire, it melts and flies off in form of a vapour. 
f However, it ought to be remarked, that when any of the 
concentrated faturated liquors ftood for ten or twelve days be- 
fore they cryftallifed, for the mod part fome cryftals of a flat, 
fquare, or of a narrow oblong parallelogram figuse, were found 
adhering to the Tides of the cup or bafon in which the liquor 
flood ; but whether this was owing to the alkaline bafis of tlicle 
falts, or to the acids approaching to each other in their nature, is 
what can only be determined by future experiments. 
