C 479 ] 
Received November 12, 17 67. 
XLIX. An Account of fome neutral Salts 
made with vegetable Acids, and with the 
Salt of Amber \ which fews that vegetable 
Acids differ from one another ; and that 
the Salt of Amber is an Acid of a parti- 
cular kind , and not the fame with that of 
Sea Salt , or of Jd itriol , as alledged by ma- 
ny chemical authors . By Donald Monro, 
M. D. Phyfician to His Majefys Ar- 
my, a?id to Saint George’s Hofpital. 
R R. S. 
Title read December 17, 1767. 
Read. January 14, 21, rflROUGH no fubftances have 
and 2S, 1768. B 1 ,, r , 
' been more generally ufed, 
both for the prefervation of health, and the cure of 
difeafes,- than vegetable acids, yet hitherto they have 
been examined with fo little care, that it has been, 
the common received opinion, that they were all 
nearly of the fame nature, at lead: as to their che- 
mical properties, and poffeffed nearly of the fame 
virtues ; but the following account of neutral 
falts, made with thefe acids, and the foffii or mi-, 
neral alkali, (hews that they differ materially from 
one another. 
1 
But 
