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Observations on the Meteorological Paper; sent by Cad-

wallader Colden to B. Franklin

177

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

187

To Thomas Clap. 8 November, 1753.

On Smeaton's Air Pump

188

JAMES BOWDOIN TO B. FRANKLIN. 12 November, 1753.

Concerning the Light in Sea-Water

190

M. DALIBARD TO B. FRANKLIN. 31 March, 1754.

Intelligence on Philosophical Subjects

193

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

Nollet's Book

197

CADWALLADER COLDEN TO P. Collinson. 28 May, 1754.

On Water-Spouts

199

To PETER COLLINSON. 25 August, 1755.

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 Noveinber, 1757.

Relating to a remarkable Aurora Borealis

211

To John PringLE. 6 January, 1758.

On the different Strata of the Earth

212

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

213

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