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TO CADWALLADER COLDEN.
Conjecture as to the Cause why Ships in crossing
the Atlantic have longer Passages in sailing west-
ward than in sailing eastward .
CADWALLADER COLDEN TO B. FRANKLIN.
Answer to the foregoing Letter respecting the
Sailing of Ships across the Atlantic
TO JARED ELIOT. 16 July, 1747.
Linseed Oil. Northeast Storms.
-
Origin of
Springs in Mountains. Petrified Shells in the
Appalachian Mountains.- Observations on a Tariff
Law
TO JARED ELIOT.
74
76
. 79
Experiments in the Culture of Grass in Meadows 83
TO THOMAS HOPKINSON. 1747.
On the Vis Inertia of Matter
747.
TO CADWALLADER COLDEN. 6 August, 1747.
Baxter's Book on the Vis Inertia of Matter.
Manufacture of Electrical Apparatus. - Colden's
Philosophical Treatise
A Conjecture as to the Cause of the Heat of the Blood
in Health, and of the Cold and Hot Fits of some
Fevers
888
87
93
97
100
104
TO JARED ELIOT. 13 February, 1749-50.
Northeast Storms begin at the South. - Account
of a Copper Mine. Subscriptions for an Acad-
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
TO JOHN PERKINS. 13 August, 1752.
Concerning the Smallpox in Philadelphia
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
Suppositions
JOHN PERKINS TO B. FRANKLIN. 16 October, 1752.
On Water-Spouts
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.
114
120
121
123
127
Properties of Water. Notice of the Author's
Writings in France
JOHN PERKINS TO B. FRANKLIN. 14 May, 1753.
Shooting Stars
174
Observations on the Meteorological Paper; by a Gentleman
in Connecticut
Observations in Answer to the Foregoing; by B. Franklin
Observations on the Meteorological Paper; sent by Cad-
wallader Colden to B. Franklin
Answer to the foregoing Observations; by B. Franklin.
Extracts from Dampier's Voyages, relating to Water-Spouts
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
M. DALIBARD TO B. FRANKLIN. 31 March, 1754.
Intelligence on Philosophical Subjects
CADWALLADER COLDEN TO B. FRANKLIN. 2 April, 1754.
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.
25 August, 1755.
177
180
183
187
190
193
195
197
199
TO PETER COLLINSON.
Account of a Whirlwind in Maryland
201
TO JOHN LINING. 14 April, 1757.
On Cold produced by Evaporation
203
JOHN BARTRAM TO B. FRANKLIN. 12 November, 1757.
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
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
Benefits derived from the Study of Insects
To MISS MARY STEVENSON. 13 September, 1760.
On the Bristol Waters, and the Tide in Rivers
TO MISS MARY STEVENSON. 30 March, 1761.
Tides in Rivers
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
222
225
231
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
TO JOHN BAPTIST BECCARIA. 13 July, 1762.
Describing a new Musical Instrument composed of
Glasses
TO OLIVER NEAVE. 20 July, 1762.
243
245
Respecting the best Mediums for conveying Sound
250
To JOHN PRINGLE. 1 December, 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-
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
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.
To M. DALIBARD. 31 January, 1768
TO CADWALLADER EVANS. 20 February, 1768.
On the Colica Pictonum, and Pernicious Use of
256
260
263
269
273
275
277
278
280
Water
TO OLIVER NEAVE.
On the Art of Swimming
To M. DUBOURG.
Modes of Swimming.
283
286
On the free Use of Air
Swimming with a Kite
To M. DUBOURG. 28 July, 1768.
A Scheme of a New Alphabet and Reformed Mode of
Spelling, with Remarks and Examples
290
294