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To MISS MARY STEVENSON. 30 March, 1761.
To MISS MARY STEVENSON. 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
232
234
239
On the Method of securing Houses from the Ef-
fects of Lightning
241
DAVID HUME TO B. FRANKLIN. 10 May, 1762.
Rods. Compliment to Dr. Franklin as a Philo-
sopher and a Man of Letters
Remarks on the Mode of constructing Lightning-
-
243
TO JOHN BAPTIST BECCARIA. 13 July, 1762.
tion. 26 February, 1763.
JOHN CANTON TO B. FRANKLIN. 29 June, 1764.
The Melting of Metals by Lightning not a cold Fu-
255
sion. - Compressibility of Water and other Fluids
256
EZRA STILES TO B. FRANKLIN. 20 February, 1765.
260
Thermometrical Experiments
TO LORD KAMES. 2 June, 1765.
On the Harmony and Melody of the old Scotch
Tunes
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
To GEORGE CROGHAN. 5 August, 1767.
On the Colica Pictonum, and Pernicious Use of
Lead in Distilleries
263
269
273
275
277
278
On the Difference of Navigation in Shoal and Deep
Water
A Scheme of a New Alphabet and Reformed Mode of.
Spelling, with Remarks and Examples
Petition of the Letter Z
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
Proposal for an Observatory in
and Mercury.
Philadelphia
TO NEVIL MASKELYNE. 12 February, 1770.
Containing an Account of Professor Winthrop's Ob-
servation of the Transit of Mercury over the Sun,
326
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
336
339
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
341
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
342
344
JOSEPH PRIESTLEY TO B. FRANKLIN. 3 June, 1772.
Experiments on Air
JOSEPH PRIESTLEY TO B. FRANKLIN. 1 July, 1772.
Curious Experiments on Air, and Discoveries of
various Properties
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"
348
351
Answer to M. Dubourg's Queries respecting the Armonica.
8 December, 1772
352
Some Directions for drawing out the Tones from the Glass-
On the Stilling of Waves by Means of Oil
To HUMPHRY MARSHALL. 14 February, 1773.
On the Spots in the Sun; Dr. Wilson's New Hy-
pothesis
353
355
368
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 Rox. 30 March, 1773.
Mr. Wilson's Opposition to Pointed Conductors. -
M. Le Roy chosen a Member of the American
Philosophical Society.
375
A new-invented Carriage Wheel.-Explosion of
Melted Iron and Glass Drops in Water.-Stove
for consuming the Smoke .
378
379
381
383
To THOMAS PERCIVAL. 25 September, 1773.
Colds produced by Contagion. - Various Causes
of Colds
Unwholesomeness of Manufacturing Establishments.
-Moist Air not unhealthy
399
402
JOSEPH PRIESTLEY TO B. FRANKLIN. 26 Sept. 1773.
New Experiments on Air
404
TO JOHN INGENHOUSZ. 30 September, 1773.
Torpedo. Magnetic Needle. -Nairne's Electri-
cal Machine. Magazines at Purfleet
JOSEPH PRIESTLEY TO B. FRANKLIN.
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
413
414
415
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
423