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CADWALLADER COLDEN TO B. FRANKLIN. 20 May, 1752.
Concerning Theories of Light
JOHN PERKINS TO B. FRANKLIN. 3 August, 1752.
Respecting the Number of Deaths in Boston by
Inoculation
TO JOHN PERKINS. 13 August, 1752.
Concerning the Smallpox in Philadelphia
114
118
120
TO CADWALLADER COLDEN. 14 September, 1752.
Remarks on Mr. Colden's Theory of Light.—
Translation of Electrical Papers into French
CADWALLADER COLDEN TO B FRANKLIN. 24 Oct. 1752.
Cause of the Cohesion of the Particles of Matter. —
Concerning a Translation of a German Writer's Re-
marks on Mr. Colden's Philosophical Principles
Physical and Meteorological Observations, Conjectures, and
121
123
JOHN PERKINS TO B. FRANKLIN. 23 October, 1752.
Further Remarks on Water-Spouts
W. MERCER TO B. FRANKLIN. 11 November, 1752.
Description of a Water-Spout at Antigua
TO JOHN PERKINS. 4 February, 1753.
Water-Spouts and Whirlwinds compared
TO JAMES BOWDOIN. 28 February, 1753.
Relating to the Transit of Mercury in 1753
TO JARED ELIOT. 12 April, 1753.
Properties of Water. Notice of the Author's
-
138
143
145
159
Observations in Answer to the Foregoing; by B. Franklin 174
Observations on the Meteorological Paper; sent by Cad-
wallader Colden to B. Franklin
.
177
180
Answer to the foregoing Observations; by B. Franklin
Extracts from Dampier's Voyages, relating to Water-Spouts 183
WILLIAM SHERVINGTON TO B. FRANKLIN. 20 June, 1753.
On the Transit of Mercury across the Sun, May
6th, 1753, observed at Antigua
To THOMAS CLAP. 8 November, 1753.
JAMES BOWDOIN TO B. FRANKLIN. 12 November, 1753.
Concerning the Light in Sea-Water
CADWALLADER COLDEN TO B. FRANKLIN. 2 April, 1754.
187
195
Water-Spouts. Wind generated by Fermenta-
tion. Winds blowing in contrary Directions
New Theory of the Motion of the Planets best
suited for calculating Astronomical Tables. - Abbé
Nollet's Book
CADWALLADER COLDEN TO P. COLLINSON. 28 May, 1754.
On Water-Spouts
TO PETER COLLINSON. 25 August, 1755.
Account of a Whirlwind in Maryland
TO JOHN LINING. 14 April, 1757.
On Cold produced by Evaporation
JOHN BARTRAM TO B. FRANKLIN.
12 November, 1757.
Relating to a remarkable Aurora Borealis
TO JOHN PRINGLE. 6 January, 1758.
On the different Strata of the Earth
TO JOHN LINING. 17 June, 1758.
Experiment with Ether for producing Cold by
Evaporation.-Water kept cool in hot Countries.
The human Body cooled by Evaporation.-
The Surface of the Earth and Vegetation cooled
in the same Manner
197
199
201
TO PETER FRANKLIN. 7 May, 1760.
On the Saltness of Sea Water
TO ALEXANDER SMALL. 12 May, 1760.
218
On the Northeast Storins in North America
219
TO MISS MARY STEVENSON. 11 June, 1760.
On the Effect of Air on the Barometer, and the
Benefits derived from
the Study of Insects
222
TO MISS MARY STEVENSON.
13 September, 1760.
On the Bristol Waters, and the Tide in Rivers
225
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.
Remarks on the Mode of constructing Lightning-
Rods. Compliment to Dr. Franklin as a Philo-
sopher and a Man of Letters
243
To JOHN BAPTIST BECCARIA. 13 July, 1762.
Relating a curious Instance of the Effect of Oil
on Water
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
EZRA STILES TO B. FRANKLIN. 20 February, 1765.
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
256
260
263
269
273
277
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.
Conjecture as to Elephants being Natives of Amer-
To M. DALIBARD. 31 January, 1768
To CADWALLADER EVANS. 20 February, 1768.
On the Colica Pictonum, and Pernicious Use of
TO SIR JOHN PRINGLE. 10 May, 1768.
On the Difference of Navigation in Shoal and Deep
Water
TO OLIVER NEAVE.
On the Art of Swimming
To M DUBOURG.
278
280
283
286
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
305
307
JOHN EWING TO B. FRANKLIN. 4 January, 1770.
Transmitting Observations of the Transits of Venus
and Mercury.
Philadelphia
To NEVIL MASKELYNE.
Proposal for an Observatory in
12 February, 1770.
Containing an Account of Professor Winthrop's Ob-
servation of the Transit of Mercury over the Sun,
November 9th, 1769.
Respecting covering Houses with Copper
326
328
To MICHAEL HILLEGAS. 17 March, 1770.
JOHN EWING TO B. FRANKLIN. 14 June, 1770
330
To SAMUEL RHOADS. 26 June, 1770.
On securing Houses from Fire
332
To THOMAS PERCIVAL.
On the different Quantities of Rain which fell at
different Heights over the same Ground
336
W. SMALL TO B. FRANKLIN. 10 August, 1771.
Opinions of the Ancient Physicians respecting Ca-
tarrhs or Colds
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
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.
Experiments on Air
JOSEPH PRIESTLEY TO B. FRANKLIN. 1 July, 1772.
Curious Experiments on Air, and Discoveries of
various Properties