xii CONTENTS. . 
XLIX. An Account of feme neutral Salts tnade with 
vegetable Acids , and with the Salt of Amber ; 
- which flews that vegetable Acids differ from one 
another ; and that the Salt of A?nber is an Acid of 
a particular Kind, and not the fame with that of 
Sea Salt , or of Vitriol , as alledged by many chemical 
Authors. By Donald Monro, M. D. Phyfician to 
His Majeftfs Army , and to Saint Georges Hofpital, 
F. R. S. p. 479. 
L. Experiments on the Di filiation of Acids , volatile 
Alcalies , &c. JJeewing how they may be condenfed 
without Lofs , and how thereby we may avoid dif- 
agreeable and noxious Fumes : In a Letter from Mr, 
Peter Woulfe, F. R. S. to John Ellis, Efquire , 
F . R , S . " P 517. 
PHILO- 
