Observations of the warmth of the sea-water, &c. by Fahrenheit's thermometer; with other remarks made on board the Reprisal, Capt. Wycks, bound from Philadelphia to France, in October and November, 1776 200 A journal of a voyage from the Channel between France and England towards America 202 On the art of swimming 206 On the same subject, in answer to some enquiries of M. Dubourg 210 On the free use of air 213 On the causes of colds 214 Dr. Stark, and Dr. Letsom 215 Number of deaths in Philadelphia by inoculation ibid Answer to the preceding 217 On the effects of lead upon the human constitution 219 Observations on the prevailing doctrines of life and death 222 An account of the new-invented Pensylvanian fire-places 225 On the causes and cure of smoky chimneys 256 Description of a new stove for burning of pitcoal, and consuming all its smoke 296 Method of contracting chimneys.--Modesty in disputation 317 Covering houses with copper 318 On the same subject 320 Paper referred to in the preceding letter 322 Magical square of squares 324 Magical circle 328 New musical instrument composed of glasses 330 Best mediums for conveying sound 335 On the harmony and melody of the old Scotch tunes 338 On the defects of modern music 343 Description of the process to be observed in making large sheets of paper in the Chinese manner, with one smooth surface 349 On modern innovations in the English language and in printing 351 A scheme for a new alphabet and reformed mode of spelling; with remarks and examples concerning the same; and an enquiry into its uses, in a correspondence between Miss S---- and Dr. Franklin, written in the characters of the alphabet 357 Rules for a club formerly established in Philadelphia 366 Questions discussed by the Junto forming the preceding club 369 Sketch of an English school; for the consideration of the trustees of the Philadelphia Academy 370 Advice to youth in reading 378 PAPERS ON SUBJECTS OF GENERAL POLITICS.