To MAJOR DAWSON, ENGINEER. 29 May, 1772.
On the Security of the Powder Magazines at Pur-
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-
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
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
Queries on Electricity, from Dr. Ingenhousz ; with An-
swers by Dr. Franklin
T. JOHN INGENHOUSZ.
An Attempt to explain the Effects of Lightning on
the Vane of the Steeple of a Church in Cremona,
The Leyden Phial, and M. Volta's Experiment
To John INGENHOUSZ. 16 May, 1783.
On an Electrical Experiment
On the Shock by the Electric Bottle, and the Density