1 9 ° ] 
VIII. On the noxious Quality of the Effluvia 
of putrid Marfhes . A Letter from the 
Rev. Dr. Prieftley to Sir John Pringle. 
To Sir JOHN PRINGLE, Baronet. 
DEAR SIR, 
conliderably farther, in feveral refpe&s, than I 
had done, when I prefented the laft account of 
them to the Royal Society ; and being encouraged 
by the favourable notice which the Society has 
been pleafed to take of them, I (hall continue my 
communications on this fubjedt ; but, without 
waiting for the refult of a variety of procefles, 
which I have now going on, or of other experi- 
ments, which I propofe to make ; I (hall, from 
time to time, communicate fuch detached articles, 
as I (hall have given the moft attention to, and 
with refpect to which, I (hall have been the moft 
fuccefsful ill my inquiries. 
Since the publication of my papers, I have read 
two tteatifes, written by Dr. Alexander, of Edin- 
burgh, and am exceedingly pleafed with the (pirit 
Redde, Dec. j6. 
1 773 - 
H 
A V I N G purfued my experi- 
ments on different kinds of air 
of 
