[ 45 1 ] 
XXXVIII. ExtraEl of a Letter from Mr, 
John Latham, Surgeon and Midwife , at 
Dartford, in Kent, to Mr, Warner, Fel- 
low cf the Royal Society , and Senior Sur- 
geon to Guy’s Hofpital. Communicated to 
the Royal Society by Mr. Warner. 
Read Nov. 7, 
1770. 
M R. A. B. about 55 years of age, was 
an healthy man till about 20 years 
fince, when he was firft feized with a fever ; at which 
time he followed the trade of a miller, and maker of 
French barley. This lad: bufinefs, he tells me, is at- 
tended with very great heat to the operator, and ex- 
pofes him to a continual cloud of dull. As foon as he 
began to work, his breath grew oppreffed with a fen- 
fation of his body being puffed up all over; from which 
fymptoms he was relieved by occafionally leaving off" 
his bufinefs. On the firft cold caught after his en- 
tering on this kind of employment, a fever attacked 
him ; which has generally returned fometimes once, 
and fometimes twice in a year, chiefly in autumn j 
but fometimes in fpring likewife : though he once 
miffed being ill for two years together. After carry- 
ing on this trade for four or five years, he left it off j 
as he attributed his diforder chiefly to the effects of 
the meal duft. Be that as it will, the fevers have 
not been fo violent fince, as while he followed that 
occupation : though the cuticle, or outer fkin, has 
come off, the fame as before. As to the particulars 
of his illnefs, they are nearly as follow: The diforder 
M m m 2 begins 
