[ 3i ] 
time ; but, three or four days after, in dreffing the 
inciftons, three or four purple fpots were obferved 
about them, which occafioned my being called in. 
I took notice, that the puftules, which were very 
numerous, were here and there livid, and in the 
arms and thighs of a dark colour, tending towards 
a mortification. Whereupon I immediately prefcribed 
^fs. of bark to be given, and repeated once in three 
hours ; which was accordingly done for eleven days 
fucceffively ; during which time he took 47 dofes 
of bark, viz. in all, 3 ounces wanting half a drachm. 
It was really wonderful to fee, how foon the bark 
alter’d the colour of the puftules, brought them on 
to digeftion, fupported the patient’s ftrength, pre- 
vented a fecond fever, and carried him thro’ the dif- 
eafe without the leaft difficulty,, or bad fymptom. 
I am, &c . 
VI. A Method of making artificial Magnet 3 
without the Ufe of natural ones ; commwii- 
cated to the Royal Society hy John Canton, 
M. A. <BP. F, R. S. 7b which is prefxed 
the PrefidentV Report . 
Read Jan. 17. 4 T a meeting of the Royal Society 
J/S°- fy, on Thurfday the 17 day of January 
1750, the Preiident acquainted the gentlemen there 
prefent, that Mr. John Canton, one of their mem- 
bers, who had for a confiderable time, and with great 
diligence,., 
