[ 383 ] 
of it in an ague ; that it had never done any harm 
and hardly ever failed to cure. Upon which infor- 
mation, I carried fome tinfture of myrrh to the wo- 
man, who tailed it, and is well allured it is the fame 
liquor the barber gave her in her ague-fit. 
I am, with refped:, 
Your obliged and obedient Servant. 
Richard GrindalL 
L. A Letter to the Rev. Tho. Birch, D. D. 
Secret. R. S. from John Pringle, M. D. 
F.R.S . inclojing Two Papers communicated 
to him by Robert Whyttr, M. D. F. R. S. 
Pallmall-Court, St. James’s, 
SIR, Dec. 10. 1757. 
Head Dec. 15. tk BOUT three weeks ago I put into 
1757 jlJL your hands an extract of a letter, 
I had then received from Dr. Whytt, containing 
a pofifcript to his Obfervations on Lord Walpole’* 
Cafe ; and Rightly mentioning fome doubts he had 
then about the juftnefs of Dr. Springsfeld’s experi- 
ments with lime-water, from fome trials he himfelf 
had made, upon reading that gentleman’s curious 
treatife on the extraordinary lithontriptic quality of' 
the waters at Carlfbad in Bohemia. Within thefe 
few Days, Dr. Whytt having favoured me with a full 
account of thofe experiments, I have herewith fent 
you. his paper, in order, if you pleafe, to lay it be- 
