r 349 3 
mediatley on approaching the tube as before, with my 
finger, and then with the key, a very great difference 
was obferved; for now the explofion was very large 
compared with the former trials. Do&or le Monnier 
defired the experiments might be repeated j which 
was done feveral times, and, to all appearance, the 
differences were the fame. 
He was perfectly fatisfied that the experiments 
were fairly made, and that the explofion was much 
greater when the apparatus communicated with the 
earth , than when it communicated with the air only. 
As feveral gentlemen of the Royal Academy of 
Sciences in Paris were of opinion that thefe experi- 
ments defer ved. attention, I thought your lordfhip 
would not be difpleafed, if I did myfelf the honour 
of communicating them. 
I am, 
My Lord, 
Your Lordfhip’s mofl obedient, 
and obliged humble fervant, 
Benjamin Wilfon, 
For a feries of experiments and obfervations where the whole eleftri- 
cal apparatus was fupported by eledtrics per fe, fee Phil Tran/. Vol. 
XLIV. p.713 — 729 — 739,740. See alfo Vol. XLV. p. 93 — ioi 
and Vol. XLVII. p. 371, 373. And Mr, Wilfon’s E/Jay, and 
Treatife, tn Elettricity, 
LIIL 
