[ 83 ! 
Kill. A Letter from Mr. Benjamin Wilfon, 
F. R . S. to the Rev. Tho. Birch, D. D. 
Secret . R . S. 
Dear Sir, 
Read Mar. 22 , ' H E inclofed letter contains fome 
1759 JL electrical experiments and obferva- 
tions, which feem to merit the attention of the 
Royal Society. I with therefore you would lay it 
before them ; and at the fame time fignify, that I 
have feen all the experiments carefully made, and 
that the feveral faCts therein contained are faithfully 
related. I am, 
SIR, 
Your molt obedient humble Servant, 
Queen-flreet, London, 
22 March, 1 759. 
B. Wilfon. 
A Letter from Edward Delaval, M. A. and 
Fellow of Pembroke-Hall, Cambridge, to 
Mr. Benjamin Wilfon, F. R. S. contaviing 
fome EleBrical Experiments and Obferva - 
tions. 
S I R, 
Read Mar. 22, T” Send you a few eleCtrical experiments 
*759- anc j obfervations ; and defire your opi- 
nion, how well they eftablifii a convertibility, I be- 
lieve hitherto unnoticed in many fubftances, from 
conductors into non-conduCtors of the eleCtric fluid. 
M 2 I have 
