13 INDEX. 



Eclipfes of Jupiter's fatellites, Vol. I. p. 21, 55. 



of the fun, Vol. I. p. 114 — Vol. II. p. 250 — of the moon, Vol. 



III. p. 150. 

 Earlh's axis, how to calculate its nutation, Vol. IV. p. 51. 

 Eccentric anomaly of the planets, how to calculate it, Vol. IV. p. 67. 

 Edinburgh, proportion of deatlis in. Vol. III. p. 40, 59. 

 Eel (eleSricalj or torpedo of Surinam defcribed. Vol. II. p. 166. 

 — (torporific) or numb-fifh defcribed. Vol. II. p. 170. 

 EffiuvLi, obfervations on, Vol. IV. p. 138. 

 ElfBriciiy, Prieftly and Beccaria's ideas of. Vol. II. p." 76— caufe of rain, 



100. 

 Ele3ric capacity, of air leffened by condenfatlon, and enlarged by heat. Vol. 

 II. p. 79. 



clouds, how generated, formed and operating. Vol. II. p. 88. 



ElcElric fluid, how accumulated and drlcharged. Vol. II. p. 75. 



. in connexion with water, compared by Dr. Franklin to water 



applied to a fponge, ib. — its effedts on certain houles. Vol. III. p. 119 

 — whether conducted by heat or its rarefying effedl ? p. 121 — its effeft 

 on a houfe with condudors, p. I2Z — modes of conducing it, p. 125, 

 3ZI — conduvfted by black-lead and charcoal, 323. 

 £/w-7r;ij/ battery of Dr. Prieftley defcribed. Vol. II. p. 93. 



Eel, or torpedo of Surinam defcribed. Vol. II. p. 166. 



EleSlriciiy, the caufe of rain. Vol. II. p. :oo. 



Ekvalor (a fpeedy) for taking views, &c. a new invented machine, defcrib- 

 ed. Vol. VI. p. 519 \_gaimd the Magellanic prize }nedal.'\ 

 Ellicot (Andrew) on looming. Vol. III. p. 62. 



, his letter on the right afcenfions and declinations of Bootes 



and the pole-fear, p. 116 — his letter on aftronomical obfervations, and 

 die dieory and method of calculating the aberration of the ftars, tlie 

 nutation of the earth's axis, and tlie femi-annual equation. Vol. IV. p, 

 32 — his method of calculating the eccentric anomaly of the planets, p. 

 67 — his mifcellaneous obfervations relative to the weflem parts of 

 Pennfylvania, particularly thofe in the neighbourhood of L. Erie, p. 

 22+ — his obfervations made on the old French fort at Prefqu'ifle to de- 

 termine the latitude of the town of Erie, p. 231 — his obfervations for 

 determining the lat. and Ion. of the town of Natchez, p. 447. 

 Elliptical orbit, how to determine the true place of a planet in an. Vol. 



IV. p. 21. 

 Emeralds, very common among the Mexicans, Vol. IV. p. 199. 

 EmpLiJis, obfervations on. Vol. III. p. 304. 

 England, formerly without chimnies. Vol. II. p. 19. 



, the ui'e of pit-coal introduced into, ib. — her atmofphere moiftcr than 

 that of N. America, p. ^'j — and cabinet works there tmfuitable to 

 American air, ib. — proportion of births in. Vol. III. p. 35, 57, 59 — 

 climate oi, p. 52. 

 Englifi lan;;ii.\^e, a table of all its diftinfl: founds. Vol. HI. p. 292. 

 Equiilion (jhui-annml) how to calculate it, Vol. IV. p. J'- 



Erie 



