p. 128, 417 — its properties, ib. — origin of it in marfh air, 420 — quan- 

 tity ot it afforded by charcoal and finery cinder, 464 — from what other 

 fubftances it may be obtained, 465. 



Hydrophobia cured in a young woman, Vol. II. p. 231. 



Hygrometer, a new conilniftion for it. Vol. II. p. 56. 



Hypothef's ( Panjian) of the eccentricity of the earth's orb and Its diftance 

 from the fun. Vol. I. p. 103. 



Iccliinilirs' manner cf warming tlieir houfes, Vol. II. p. 34. 



Inclined planes, a capital improvement in canal navigation, and far fuperior 

 to locks. Vol. IV. p. .-99. 



Index Jlora Lar.Ci'Jfrienfts, Vol. III. p. 157. 



Indian afi/iqui/iei of America defcribed. Vol. Ill p. 214 — Vol. IV. p. 179, 

 181, 184, 198. 



traditions. Vol. III. p. 216, 220, Vol. IV. p. 188, 260 — dyes. Vol. 



III. p. 222 — languages, cuftoms, manners and genius, 720, Vol. IV. 

 p. 190, 20J — ancient monuments, Vol. III. p. 214, Vol. IV. p. 179, 

 181. 



corn, originally the only grain of America, Vol. \. fref. p. iii. 



dart-points. See Shark's teeth. 



hemp deferving attention. Vol. I. pref. p. x. 



Indians (ylmerican) long lived, Vol. III. p. 50, 51 — traditions, 216, 220 

 — languages, cuftoms, manners and genius, ib. — fome apcount of for- 

 mer tribes, Vol. IV. p. 183 — I'uperftitious veneration for certain birds, 

 &c. p. 206. 



population of, below the falls of rivers on tlie fettlement of Ame- 



lica. Vol. IV. p. 252. 

 -fculpture, on a rock at Kenhawa, Vol. IV. p. 253, 



Inflammable air, or plilogifton, obfervations on. Vol. IV. p. 2, &c. — may be 



produced from fpirits of wine, ib. p. 19 — its properties, ib. p. 130 



proportion of it in the atmofphere, 7, 128, 417 — whence formed, 420. 



■ fluids, defcription of a propofed veifel for boiling them. Vol. IV. 



P-43I- 



Injlammation, why an exciter of heat. Vol. I. appendix p, 34. 



Inguana [firen] an intermediate clafs connecfting the amphibia: with fifli, 

 Vol. IV. p. 277 — a new fpecies of it detected in Peale's mufeum, ib. 

 — a fcientific defcription of it, 279. 



Inland navigation, propofed improvements in. Vol. I. p. 293. 



Infcription (curious) near Naples, Vol. I. p. 285. 



Infers, how to proteft pulfe and grain againft. Vol. I. p. 222. 



Injlruments ufed in Pennfylvania for obferving the tranfit of Venus at differ- 

 ent places in 1769, Vol. I. p. 10, 13. 



Introdudion, being an eflay on thofe enquiries in natural philofophy, which 

 at prefcnt are moft beneficial to the U. States, Vol. III. p. iii. 



Ireland, its temperatuie of climate equable ; yet feldom affords three months 

 fummer weather. Vol. IV. p. 244 — quantity of rain fometimes there, 

 ib. — its eaft winds produce epidemic inflammatory diforders, ib. 



Iron 



