[ 218 j 
After 1 had long conftdercd and examined thefe 
Principles in my Mind, I fatisfled myfelf, that they 
might juftly be applied to many other Cafes ; and 
that the Medicine would be of efpecial Service in 
malignant putrid Fevers, and Convulflons : And hav- 
ing, in the Year 1739. contracted with the Govern- 
ment for the Tranfportation of ConviCfs, I commu- 
nicated my Opinion to Mr. Da vid Rofs, an inge- 
nious and feniible Surgeon, whom I had employed 
to take care of their Healths ; and prevail’d on him 
to make the Experiment in a very defperate Cafe ; 
for I did not care to venture on any other. Pleafc, 
in the mean time, to obferve, that, as Tonquin 
Vermilion was not to be had, I fubftituted an equal 
Quantity of factitious Cinnabar in its (lead, and fome- 
times gave Rum or Brandy inflead of Arrack ; in 
other Things I' generally adher’d to the original Pre- 
ieription. 
Case I. 
In December 1739. two ConviCts in Newgate 
were at the fame time very ill of the putrid, infec- 
tious, malignant Fever, commonly call’d the Gaol 
Diftemper. Ail the ufual Methods of Practice hav- 
ing been tried in vain, their Condition appear’d to 
be quite defperate. One of them died in the Even- 
ing, and the other was not expeCted to furvive till 
Morning, being covered with flat petechial Spots, 
and delirious. Mr. Rofs therefore adminiftred to 
him the above deferibed Medicine about 9 or 10 
o’ Clock at Night and, next Morning, to his great 
Surprize, found him quite free from the Fever, eat- 
ing 
