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TO PETER FRANKLIN. 7 May, 1760.
On the Saltness of Sea Water
TO ALEXANDER SMALL. 12 May, 1760.
On the Northeast Storms in North America
TO MISS MARY STEVENSON. 11 June, 1760.
On the Effect of Air on the Barometer, and the
On the Bristol. Waters, and the Tide in Rivers
TO MISS MARY STEVENSON.
30 March, 1761.
Tides in Rivers
10 August, 1761.
Salt Water rendered fresh by Distillation.- Meth-
od of relieving Thirst by Sea Water
To MISS MARY STEVENSON. 20 September, 1761.
Tendency of Rivers to the Sea. Effect of the
Sun's Rays on Cloths of different Colors
TO DAVID HUME. 24 January, 1762.
On the Method of securing Houses from the Ef-
fects of Lightning
DAVID HUME TO B. FRANKLIN. 10 May, 1762.
Remarks on the Mode of constructing Lightning-
Rods. Compliment to Dr. Franklin as a Philo-
sopher and a Man of Letters
To JOHN BAPTIST BECCARIA. 13 July, 1762.
Relating a curious Instance of the Effect of Oil
Congelation of Quicksilver.-Cold produced by Evapora-
tion. 26 February, 1763 .
John CANTON TO B. FRANKLIN. 29 June, 1764.
The Melting of Metals by Lightning not a cold Fu
sion. Compressibility of Water and other Fluids
EZRA STILES TO B. FRANKLIN. 20 February, 1765.
To LORD KAMES. 2 June, 1765.
On the Harmony and Melody of the old Scotch
TO PETER FRANKLIN.
On the Defects of Modern Music
JOSEPH PRIESTLEY TO B. FRANKLIN. 21 September, 1766.
Relating to a History of Electricity. Curious
Experiments with an Electrified Chain
A Scheme of a New Alphabet and Reformed Mode of
TO JOHN WINTHROP. 11 March, 1769.
Telescope and Books for Harvard College
To M. DUBOURG. 30 August, 1769.
Introducing Dr. Lettsom
JOHN EWING TO B. FRANKLIN. 4 January, 1770.
Transmitting Observations of the Transits of Venus
and Mercury. Proposal for an Observatory in
To NEVIL MASKELYNE. 12 February, 1770.
Containing an Account of Professor Winthrop's Ob-
servation of the Transit of Mercury over the Sun,
November 9th, 1769
To MICHAEL HILLEGAS. 17 March, 1770.
On the different Quantities of Rain which fell at
different Heights over the same Ground
W. SMALL TO B. FRANKLIN. 10 August, 1771.
Opinions of the Ancient Physicians respecting Ca-
tarrhs or Colds
To M. LE ROY. 20 April, 1772.
Intended French Voyage to the North Pole. — Mr.
West, President of the Royal Society.. Messrs.
Banks and Solander
To JOSEPH PRIESTLEY. 4 May, 1772.
Electrical Experiments.—Imperfection of the Abbé
Nollet's Electrical Machine.-One on an improv-
ed Construction sent to M. Le Roy
JOSEPH PRIESTLEY TO B. FRANKLIN.
3 June, 1772.
JOSEPH PRIESTLEY TO B. FRANKLIN. 1 July, 1772.
Curious Experiments on Air, and Discoveries of
JOHN WALSH TO B. FRANKLIN. 12 July, 1772.
Experiments for ascertaining the Electrical Proper-
ties of the Torpedo
J. B. TODERINI TO B. FRANKLIN. 15 August, 1772.
Giving an Account of a Work published by him,
entitled "Filosofia Frankliniana "
Answer to M. Dubourg's Queries respecting the Armonica.
8 December, 1772
Some Directions for drawing out the Tones from the Glass-
es of the Armonica
On the Stilling of Waves by Means of Oil
T HUMPHRY MARSHALL. 14 February, 1773.
On the Spots in the Sun; Dr. Wilson's New Hy-
M. DE SAUSSURE TO B. FRANKLIN. 23 February, 1773.
Conductors of Lightning.
Project of the Royal
Society to ascertain the Attraction of Mountains.-
Volcanic Eruptions. — Experiments on the Torpedo 371
JOHN WINTHROP TO B. FRANKLIN. 4 March, 1773.
Dr. Priestley. - Effects of Lightning
To M. DUBOURG. 10 March, 1773.
On the Causes of Colds
To M. LE ROY. 30 March, 1773.
Mr. Wilson's Opposition to Pointed Conductors. —
M. Le Roy chosen a Member of the American
A new-invented Carriage Wheel. - Explosion of
Melted Iron and Glass Drops in Water. - Stove
for consuming the Smoke.
To M. DUBOURG. 29 June, 1773.
Inquiries on the Causes of Taking Cold
Preparatory Notes and Hints for writing a Paper concern-
ing what is called Catching Celd
To SAMUEL COOPER. 7 July, 1773.
Stoves for Public Buildings
JOSEPH PRIESTLEY TO B. FRANKLIN. 26 Sept. 1773.
New Experiments on Air
TO JOHN INGENHOUSZ. 30 September, 1773.
Torpedo. - Magnetic Needle. - Nairne's Electri-
cal Machine. Magazines at Purfleet
Experiments on Alkaline Air
ERASMUS DARWIN TO B. FRANKLIN.
14 Oct. 1773.
24 Jan. 1774.
Communicating a Philosophical Paper
TO THE MARQUIS DE CONDORCET. 20 March, 1774.
Answers to Questions on Philosophical Subjects
TO JOHN BAPTIST BECCARIA. 20 March, 1774.
English Translation of Beccaria's Book. Ex-
periment to show that Electricity does not pass
through a perfect Vacuum
To JOSEPH PRIESTLEY.
Effect of Vegetation on Noxious Air
TO JOSEPH PRIESTLEY. 10 April, 1774.
On the Inflammability of the Surface of certain
Rivers in America
On the Aurora Borealis
JOSEPH PRIESTLEY TO B. FRANKLIN. 27 Sept. 1779.
Vegetation of Plants in Water
PIETRO TURINI TO B. FRANKLIN. 18 Sept. 1780.
Communicating Intelligence of a new Work on