INDEX. 41 



T/ann Spring (Virginia) barometrical meafurement of, Vol. IV. p. 216. 



IVas-ift-das delcribed, Vol. II. p. 9, 10. 



Wajlyingion (city of) account of the manner of laying it out, and running 



the 10 miles fquare. Vol. IV. p. 49. 

 Water, experiments on tlie generation of air, from Vol. IV. p. 11. 



, the difference between pure and impure, in the prefervation of dead 



flelh, Vol. IV. p. 131. 



, why warmer or colder than land. Vol. I. p. 274 — compared to a 



fponge, Vol. II. p. 75 — experiments on the evaporation of, 118 — 

 great attraiftion to heat, 144. 



how to find its retarded velocity, and time of afcent into an exhauft- 



ed receiver, through a tube by the affiftance of the parabola. Vol. 

 IV. p. 353. 

 ftatc ot at fea, Vol. III. p. 90, 2Co. 



Water-mills, on the theory of. Vol. III. p. 144, 185, 319. See Mills. 



ruttle-fnake. See Rattk-fnake. 



-/pouts, theory of. Vol. II. p. loi — occafioned by whirlwinds, 116 



— a beautiful account of one, 102 — curious effefl of one, 116 — conjec- 

 tures concerning them, 335 — feveral defcribed, to prove tliat their 

 water defcends, 336. 



Wax, not produced by the bee only. Vol. III. p. 244. 



Way of ajliip, a new invention for meafuring it, Vol. III. p. 239. 



Weights and meafures, new ftandard for, Vol. III. p. 328. 



Weill (R'uhar,!) his account of a new invented machine for pumpmg leaky 

 veflels at fea, without manual labour, Vol. I. p. 289. 



/Kf///, how to diflipate their vapours. Vol. III. p. 324. 



Wefl (Benjamin) his account of the tranfit of Venus as obferved at Provi- 

 dence (R. I.) 1769, Vol. I.J5. 97. 



Wefiern country oi'i^. America, antiquities, &c. of. Vol. III. p. 214 — prodi- 

 gious oifter Ihells found there, 2 1 8 — alfo abundance of other foflil ihells, 

 concretions, petrifaflions, bones, &c. ib. — prairies, 219 — former height 

 of the Mifliflippi, ib. — lofty rocks curioufly marked, ib. 



Wheat, deftroyed by a fly weevil, with means for preventing it. Vol. I. p. 

 205 — on the fame fubjeft, 218. 



Whip-poor-imll, fome account of, Vol. IV. p. 208. 



White mountains of N. Hampfhirc, defcribed by R^v. Jeremy Belknap, Vol. 

 11. p. 4-; to 49. 



Whirliuinds, the cauie of water fpouts, Vol. II. p. ill — defcribed under the 

 name of wind fpout, 342. 



Williams (Rev. Dr. Samuel) his experiments on evaporation and his meteoro- 

 logical obfervations. Vol. II. p. 1 18 — his account of the tranfit of Ve- 

 nus, June 3, 1769, p. 746 — of Mercury, Nov. 9, 1769, p. 249 — his 

 obfervation of a folar eclipfe, Nov. 6, 1771, p. 250 — his magnetic ob- 

 fervations at Cambridge, Maffachufetts, in 1785, Vol. III. p. 115. 



Williams (Jona.) his communication on Captain Billings's thermometrical 

 journal of the air and water at fea. Vol. III. p. 194 — on the ufe of the 

 'thermometer, in dilcovering banks, foimdings, &c. p. 82 — his ther- 

 mometrical journal of the temperature of the atmofphere and fea, 90 — 

 his barometrical meafurement of the Blue-Ridge, Warm-Spring and 

 Alleghany mountains in Virginia, Vol, IV. p. 216. 



Witliamfin 



