[ 4«i ] 
with the fame acid, according as the original fait is 
of an acid, or of an alkaline nature, and find upon 
difiolving, evaporating, and cryftallifing the neutral 
falts, that they are all of the fame kind, we con- 
clude, that the original acid, or alkali, was the fame 
in all ; but if we obtain different neutral lalts from 
each, we conclude that the original acid, or alkali,' 
was different in each. 
It there are no more alkaline falts in nature, 
than the three already mentioned ; and if there were 
no more acids than four 5 then the number of neutral 
falts would be confined to the twelve marked in Dr. 
Cullen’s Table ; but it will appear from the follow- 
ing experiments, that inftead of one, there are many 
vegetable acids ; and that, therefore, the number of 
true neutral falts muff be greatly multiplied *. 
* Dr. Cullen’s Table of neutral Salts. 
Acid 
Alkaline 
Neutral Salt 
Acid 
Alkaline 
Neutral Salt 
Vitriolic 
V egetable 
Foffil 
Volatile 
Vitriolic Tartar 
Glauber Salt 
Vitriol. Ammoniac 
Marine 
or 
Muriatic 
V egetable 
Foffil 
Volatile 
Sal. digeft. Svlvii 
Common Salt 
Common Ammoniac 
Nitrous 
Vegetable 
Foffil 
Volatile 
Common Nitre 
Cubic Nitre 
Nitrous Ammoniac 
Vegetable 
Vegetable 
Foffil 
V olaiile 
Regenerated Tartar 
Rochelle Salt 
Spiritus Miudereri 
Dr. Vogel, Profeflbr of chemiftry in the univei fity of Got- 
tengen, in his Inftiturioncs Chemiae, publifhed in 1752, gives 
a table of . neutral falts, which comprehends the twelve men- 
tioned bv Dr. Cullen, with the addition of three or four more. 
He fee ms to believe, that the acid of vitiiol forms a different 
neutral fait with the pot-afh, and with. the alkali procured from 
nitre. lie mentions three falts, made with the vegetable alkali 
VoL. LVII. Qjj q Many 
