[ 5*7 1 
Received November 1 9, 1767* 
L. Experiments on the Dift illation of Acids , 
volatile Alkalies , Me. foewing how ^ they 
may he condenfed without Lofs> and how 
thereby we may avoid dif agreeable and nox- 
ious Fumes: In a Letter from Mr. Petei 
Woulfe, F. R. S . to John Ellis, Ffq\ 
F. R. S. 
Title read December 17, 1767* 
SIR, 
Read Feb. 4, TN the common manner of diftiilation 
i 7 6S. 1 t here efcapes a great quantity of fumes, 
which cannot be condenfed ; and in feveral opera- 
tions thefe fumes are very hurtful to the lungs, by 
the following method of diftiilation thefe fumes are 
totally condenfed, which makes a great faving m 
fome diftillations, and the operator is in no danger 
of being hurt by any pernicious vapours. 
This new method confifts in making the fumes 
pafs by a fmall glafs tube through water, which 
hereby becomes charged with the vapours, that 
would otherwife efcape. 
Defcription 
