CONTENTS. 
t 
XLIX. A Letter to the Right Honourable George 
Macclesfield, Rrejident of Royal So- 
ciety, concerning the Stones tnentioned in the 
preceding Article By Mr. Arthur Pond, F. R. S. 
p. 2p/. 
L. An Account of the EffeBs of Lightning in the 
Danifh Wcilclofe- Square. By Gufta- 
vus Brandcr, Efq', F.R.S. p. 25)8. 
LT. EleBrical Experiments^ made in purfuance of 
thofe by Mr. C^mcjw, dated EitcQmhzi: 3, i75’3; 
with Explanations by Mr. Benjamin Franklin. 
Communicated by Mr. Peter Collinfon, F. R. S. 
p. 300. 
LII. ExtraB of a Letter concerning EleBncity, 
from Mr. B. Franklin to Delibard, inclofed 
in a Letter to Mr. Peter Collinfon, F. R. S. 
^ P- Bof- 
LIII. A Letter concerning the EffeBs of Lightning 
at Darking in Surrey, from Mr. William Child 
to Mr. fames Pitfold. Communicated by Mr. 
Peter Collinfon, F. R. S. p. 305). 
LIV. An Account of the great Benefit of blowing 
Mowers of frefl Air tip through diftilling Li- 
quors. By Stephen Hales, D. D. F. R. S. p- 3 1 2. 
LV. An Account of the great Benefit of Ventila- 
tors in many Injlances, in preferring the Health 
and Lives of Feople, in Slave and other TranJ- 
port Ships. By Stephen Hales, T). ^D. F. R. S. 
P-332. 
LVI. An Account of fome, Trials to cure the ill 
fafle of Milk ^ which is occafioned by the Food of 
Cows, either from Turnips, Cabbages, or autum- 
nal Leaves, &c. A.lfo to fweeten fiinking Water, 
6 :c. By Stephen Hales, T). D. F. R. S. p. 339. 
b 2 LVir. 
