this Hypothesis. — Improvement in a Globe for
raising the Electric Fire . . . . . . 269
E. KINNERSLEY To B. Franklin. 3 February, 1752.
New Experiments. — Paradoxes inferred from them.
- Difference in the Electricity of a Globe of Glass
charged, and a Globe of Sulphur. — Difficulty of
ascertaining which is positive and which negative 273
To E. KINNERSLEY. 2 March, 1752.
Probable Cause of the different Attractions and
Repulsions of the two Electrified Globes mentioned
in the preceding Letter . . . . . . 275
James Bowdoin to B. Franklin. 2 March, 1752.
Effect of Lightning on Captain Waddel's Compass,
and on the Dutch Church at New York . . . 276
James Bowdoin to B. FRANKLIN. 16 March, 1752.
Remarks on Dr. Colden's Letter respecting the
Electricity of the Clouds . . . . . . 279
To E. KinnERSLEY. 16. March, 1752.
Reasons for supposing that the Glass Globe charges
positively, and the Sulphur negatively. — Hint re-
specting a Leather Globe for Experiments when
travelling . . . . . . . . 280
To Cadwallader Corden. 23 April, 1752..
Mistake, that only Metals and Water were Con-
ductors, rectified. — Supposition of a Region of
Electric Fire above our Atmosphere. — Theorem
concerning Light. - Poke-weed a Cure for Cancers 283
M. DalibARD's Account of an Electrical Experiment at
Marly . . . . . . . . . . 288
ABBÉ Mazkas to Stephen HalES. 20 May, 1752.
Giving a further Account of the Electrical Experi-
ment at Marly . . . . . . . . 293
To Peter Collinson. 19 October, 1752.
Electrical Kite . . . . . . . 295
W. Watson to the Royal Society. 21 Dec. 1752.
Concerning the Electrical Experiments in England
upon Thunder-clouds . . . . . . . 296
To James Bowdoin. 12 April, 1753.
On the Mode of coating Electrical Jars . . . 299