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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 Storins. Origin of
Springs in Mountains. — Petrified Shells in the
Appalachian Mountains.- Observations on a Tariff
Experiments in the Culture of Grass in Meadows 83
To CADWALLADER COLDEN. 6 August, 1747.
Baxter's Book on the Vis Inertiæ of Matter.
Manufacture of Electrical Apparatus. - Colden's
A Conjecture as to the Cause of the Heat of the Blood
in Health, and of the Cold and Hot Fits of some
To JARED ELIOT. 13 February, 1749 - 50.
Northeast Storms begin at the South. — Account
of a Copper Mine.- Subscriptions for an Acad-
To CADWALLADER COLDEN. 28 June, 1750.
Electrical Papers and Experiments. - James Logan 109
To JARED Eliot. 25 October, 1750.
Inquiries respecting the Mode of Planting Hedges 111
TO JARED ELIOT. 10 December, 1751.
CADWALLADER COLDEN TO B. FRANKLIN. 20 May, 1752.
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
JOHN PERKINS TO B. FRANKLIN. 16 October, 1752.
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 Bowdown. 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
John PERKINS TO B. FRANKLIN. 14 May, 1753.
Observations on the Meteorological Paper; by a Gentleman
Observations on the Meteorological Paper; sent by Cad-
wallader Colden to B. Franklin
Answer to the foregoing Observations; by B. Franklin . 180
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
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 195
CADWALLADER COLDEN TO B. FRANKLIN. 2 April, 1754.
New Theory of the Motion of the Planets best
suited for calculating Astronomical Tables.-Abbé
CADWALLADER COLDEN TO P. Collinson. 28 May, 1754.
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 Noveinber, 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
To PETER FRANKLIN. 7 May, 1760.
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.
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
To David Hume. 24 January, 1762.
On the Method of securing Houses from the Ef-
DAVID HUME TO B. FRANKLIN. 10 May, 1762.
Remarks on the Mode of constructing Lightning-
Rods. - Compliment to Dr. Franklin as a Philo-
To John Baptist BECCARIA. 13 July, 1762.
Describing a new Musical Instrument composed of
To OLIVER Neave. 20 July, 1762.
Respecting the best Mediums for conveying Sound
To JOHN PRINGLE. 1 December, 1762.
Relating a curious Instance of the Effect of Oil
Congelation of Quicksilver.-Cold produced by Evapora-
JOHN CANTON TO B. FRANKLIN. 29 June, 1764.
sion. - Compressibility of Water and other Fluids
EZRA STILES TO B. FRANKLIN. 20 February, 1765.
On the Harmony and Melody of the old Scotch
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.
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 LORD KAMES. 28 February, 1768.
To Sir John PRINGLE. 10 May, 1768.
On the Difference of Navigation in Shoal and Deep
Modes of Swimming. - Answer to Inquiries. —
A Scheme of a New Alphabet and Reformed Mode of
Spelling, with Remarks and Examples
TO JOHN WINTHROP. 11 March, 1769.
Telescope and Books for Harvard College
To M. DUBOURG. 30 August, 1769.