14 INDEX. 



Fevers in Pennfylvania, bilious and intermitting, with hints for preventing 



them, Vol. II. p. 206 — how cured, 290. 

 Figs, method of /curing. Vol. I. p. 19S. 

 Fiies, defcription of a machine for cutting. Vol. I. p. 300 — its fuperiority, 



302. 

 Finery cinder [fcales of iron] obfervations on. Vol. IV. p. 466. 

 Fire, A machine tofave perfons from. Vol. IV. p. 143 — others, p. 143, 519^ 

 Fin-places, how to be conllruifled. Vol. II. p. 10. See Stoves. 

 [S^ajiri/ihire) defcribed. Vol. II. p. 25 — mifchicf of large ones, 



35 — a moll ingenious one for warming feveral rooms defcribed, 36. 

 7v/7', their characters as given by Vicq, D'Azir and D'Aubenton, Vol. IV. 



p. 280. 

 Fijlies falling with rain, accounted for. Vol. II. p. 117. 



experiments on the animal heat of, Vol. III. p. 98. 



Fixed air. See Carbonic acid gas. 



Fiagg (Henry Collins) his obfervations on the numb fifli or torporific eel, Vol, 



II. p. 170. 

 Floating anchor recommended againft a lee fhore. Vol. II. p. 311. 

 Florida (IFcfl) letter concerning. Vol. 1. p. 250 — natural produdls, ib. — ac- 

 count of its climate, 251, Vol. III. p. 48 — gulf of Mexico, 252. 



Indians acquainted with tin. Vol. IV. p. 202. 



( Eaji) fome account of its climate. Vol. III. p. 48. 



Fluids, nature and properties of. Vol. II. p. 104. 



Fly-nuevil dellruilive to wheat, obfervations on it, Vol. I. p. 205 — further 



obfervations, 218. 

 Fogs remarkably denfe but innoxious on tlie rivers Ohio and Allegany, Vol. 



IV. p. 225. 

 Foreign plants deferving attention in N. America, catalogue of. Vol. I. p. 



Fortifications (remains of Indian) Vol. III. p. 215, Vol. IV. p. 178. 

 FoJpli\\i\\s and bones, numerous in the wellern country. Vol. III. p. 218 — 



and elfewhere in America, Vol. IV. p. 439, 444. See Bones, Oijler, 



Shark. 

 FraBurcs of the fcull, a new method of treating tliem, Vol. IV. p. 439. 

 France, air of, moifter than tliat of America, Vol. II. p. 55 — population, 



&c. of, Vol. III. p. 32 — proportion of births and deaths in, 36, 41, 



59- 

 Franklin (Dr. Benj.) letter from him on chimnies, Vol. II. p. i — his love 

 of frelh air ; fleeps with open window; holds night air, moid air, and 

 damp linnen as not unwholefome, 2 1 — propofes an apparatus for leflur- 

 ing on fmoke and rarefied air, 22 — makes fmoke defcend, and defcribes 

 a itove of his invention, 24 — difcovers a curious property of chimnies 

 in fummer ; its utility and caiife explained, 30 — his letter to Mr. Nairne 

 on hygrometers ; with interefting fadls concerning the ftate of tlie atmof- 

 phere in England, France and N. America, 51 — his defcription of a 

 new ftove that confumes its fmoke, 57 — his interefting letter to AI- 

 phonfus Le Roy, concerning maritime obfervations, &c. 294 — his ob- 

 fervations on the warmtli of fea- water in the gulph dream, &c. 325, 



32Cj 



