Über dieses Buch
of Domien, an Electrician and Traveller. Con-
jectures respecting the Pores of Glass.- Origin of
the Author's Idea of drawing down Lightning. -
No satisfactory Hypothesis respecting the Manner
in which Clouds become electrified. - Six Men
knocked down at once by an Electrical Shock.
Reflections on the Spirit of Invention
To M. DALIBARD. 29 June, 1755.
--
Beccaria's Work on Electricity. - Sentiments of
Franklin on pointed Rods, not fully understood in
Europe. Effect of Lightning on the Church of
Newbury, in New England. - Remarks on the
Subject.
TO JOHN PRINGLE. 21 December, 1757.
On the Effects of Electricity in Paralytic Cases
TO THOMAS HUBBARD. 28 April, 1758.
Electrical Apparatus.- Description of a Battery.
To WILLIAM HEBERDEN. 7 June, 1759.
On the Electricity of the Tourmalin
E. KINNERSLEY TO B. FRANKLIN. 12 March, 1761.
Experiments on boiling Water, and Glass heated by
boiling Water. -Doctrine of Repulsion in elec-
trized Bodies doubted. Electricity of the Atmo-
sphere at different Heights. Electrical Horse-
Electrical Thermometer. In what Cases
the Electrical Fire produces Heat.- Wire length-
ened by Electricity. Good Effect of a Rod on
the House of Mr. West, of Philadelphia,
race.
-
To E. KINNERSLEY. 20 February, 1762.
Answer to some of the foregoing Subjects. How
long the Leyden Bottle may be kept charged.-
Heated Glass rendered permeable by the Electric
Fluid. Electrical Attraction and Repulsion.
Reply to other Subjects in the preceding Paper.
Numerous Ways of kindling Fire. - Explosion of
Water. Knobs and Points
Accounts from Carolina (mentioned in the foregoing
Letter) of the Effects of Lightning on two of the
347
355
359
361
363
367
378
Rods commonly affixed to Houses there, for secur-
ing them against Lightning. 1 November, 1760.
Mr. William Maine's Account of the Effects of the
Lightning on his Rod, dated at Indian Land, in
South Carolina, August 28th, 1760.
Remarks by Benjamin Franklin
To MISS MARY STEVENSON. 22 March, 1762.
Concerning the Leyden Bottle.
Electrical Experiments on Amber. 3 July, 1762 . JOHN WINTHROP TO B. FRANKLIN.
29 Sept., 1762.
ALEXANDER SMALL TO B. FRANKLIN.
Flash of Lightning that struck St. Bride's Steeple
To PETER FRANKLIN.
Best Method of securing a Powder Magazine from
Lightning
TO THOMAS RONAYNE. 20 April, 1766.
On the Electricity of the Fogs in Ireland
395
396
398
403
405
406
407
409
Mode of ascertaining whether the Power, giving a Shock
to those who touch either the Surinam Eel or the
Torpedo, be Electrical
Addition, 12 August, 1772, in Consequence of the Ex-
periments and Discoveries made in France by Mr.
Walsh, and communicated by him to Dr. Franklin
Of Lightning, and the Methods (now used in America)
of securing Buildings and Persons from its mis-
chievous Effects.
412
413
JOHN WINTHROP TO B. FRANKLIN. 6 January, 1768.
St. Bride's Steeple
To JOHN WINTHROP. 2 July, 1768.
On Conductors for protecting Houses from Light-
ning. Singular Kind of Glass Tube
E. KINNERSLEY TO B. FRANKLIN. 13 October, 1770.
On some Electrical Experiments made with Char-
coal
419
426
TO MAJOR DAWSON, ENGINEER. 29 May, 1772.
On the Security of the Powder Magazines at Pur-
fleet.
Report on Lightning Conductors for the Powder Maga-
zines at Purfleet. 21 August, 1772
Experiments, Observations, and Facts, tending to sup-
port the Opinion of the Utility of long, pointed
Rods, for securing Buildings from Damage by
Strokes of Lightning
Description of a Portable Apparatus, invented by Mr.
John Canton, for the Purpose of easily demonstrat-
ing Dr. Franklin's fundamental Principles of Elec-
tricity
To M. DUBOURG. 1 June, 1773.
In Answer to some Queries concerning the Choice of Glass for the Leyden Experiment
To JOHN WINTHROP. 25 July, 1773. On Conductors of Lightning
To M. DUBOURG. 10 March, 1773.
On the Analogy between Magnetism and Electricity 450
M. DUBOURG TO B. FRANKLIN. 25 March, 1773.
On the Choice of Glass for the Leyden Experiment 453
To MESSRS. DUBOURG AND DALIBARD.
Concerning the Mode of rendering Meat tender by
Electricity
Queries on Electricity, from Dr. Ingenhousz; with An-
swers by Dr. Franklin
TO JOHN INGENHOUSZ.
An Attempt to explain the Effects of Lightning on
the Vane of the Steeple of a Church in Cremona,
August, 1777
427
The Leyden Phial, and M. Volta's Experiment
16 May, 1783.
On an Electrical Experiment
To JOHN INGENHOUSZ.
On the Shock by the Electric Bottle, and the Density
of Glass.
430
435
446
456
459
461
462
467
476
477
478
To EDWARD NAIRNE. 18 October, 1783.
On his patent Electrical Machine, and the Effects of
Lightning on the Eyes of Animals killed by it. 479
To JOHN INGENHOUSZ. 29 April, 1785.
Effect of an Electrical Shock
480
To PROFESSOR LANDRIANI. 14 October, 1787.
On the Utility of Electrical Conductors
482
APPENDIX TO THE PAPERS ON ELECTRICITY.
487
No. I. Watson's Abstract of Franklin's Electrical Experi-
ments and Observations
No. II. Letter from the Abbé Nollet to Benjamin Franklin 493
No. III. Speech of the Earl of Macclesfield, President of
the Royal Society, on the Occasion of awarding to
Franklin a Medal for his Discoveries in Electricity
No. IV. Letter from John Baptist Beccaria to Benjamin
Franklin.
499
505
No. V. Letter from Professor Thorbern Bergman, of Up-
sal, to Benjamin Wilson
513
No. VI. Letter from M. Dubourg to M. de Lor. Parallel
between the Theories of Franklin and Nollet .
