Memoirs of Benjamin Franklin · Benjamin Franklin
PHILOSOPHICAL SUBJECTS.
To the Abbé Soulavie.--Theory of the Earth 203 To Dr. John Pringle.--On the different Strata of the Earth 207 To Mr. Bowdoin.--Queries and Conjectures relating to Magnetism and the Theory of the Earth 208 To M. Dubourg.--On the Nature of Seacoal 211 Causes of Earthquakes 212 To David Rittenhouse.--New and Curious Theory of Light and Heat 224 Of Lightning; and the Methods now used in America for the securing Buildings and Persons from its mischievous Effects 227 To Peter Collinson.--Electrical Kite 231 Physical and Meteorological Observations, Conjectures, and Suppositions 232 To Dr. Perkins.--Water-spouts and Whirlwinds compared 240 To Alexander Small.--On the Northeast Storms in North America 254 To Dr. Lining.--On Cold produced by Evaporation 256 To Peter Franklin.--On the Saltness of Seawater 263 To Miss Stephenson.--Salt Water rendered fresh by Distillation.--Method of relieving Thirst by Seawater 264 To the same.--Tendency of Rivers to the Sea.--Effects of the Sun's Rays on Cloths of different Colours 266 To the same.--On the Effect of Air on the Barometer, and the Benefits derived from the Study of Insects 270 To Dr. Joseph Priestley.--Effect of Vegetation on Noxious Air 273 To Dr. John Pringle.--On the Difference of Navigation in Shoal and Deep Water 274 To Oliver Neale.--On the Art of Swimming 277 To Miss Stephenson.--Method of contracting Chimneys.--Modesty in Disputation 281 To M. Dubourg.--Observations on the prevailing Doctrines of Life and Death 282 Lord Brougham's Portrait of Dr. Franklin 285 * * * * * * * * * * _As dearly shown in the practice of an old Pennsylvania Almanac, entitled, "Poor Richard Improved."_
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