NOTE ; that as a fecond edition -of Vol. I. has been publifhed and pagea 

 diiFerently from the firft, it is necefTary to remark th;it the follow- 

 ing Indi-x refers to the firft ediiion alone. 



GENERAL INDEX 



TO THE FIRST FOUR VOLUMES. 



A 



ABERRATION of the Stars, how to calculate it, Vol. IV. p. 51. 



ylccenis, obfervations on, Vol. Ill page ^01. 



Acer faccharinum defcribed, Vol. III. p 64 — its fap a pleafant drink, 68, 



69 — method of making fugar from it, 67, 69 — and compared with 



that of the Weft Indies, 71 — virtues and various ufes of the maple 



fugar and fap, 73. See Su^ar, 

 Acid (tiegetalle) combined with marine fait, antifeptic virtues of, Vol. 



II. p. 2^4. ^ 



(carbonic) See carlonlc acid. 



• fnilricJSee Nitric acid. 



Acids (fulphuric and muriatic) of the folution of iron in, Vol. IV. p. 457 



Ad incorporating the A. Philo. Soc. Vol. II. p. xi. 



Advcr/i/emenis of the A. P S. Vols. I. and IV. p. iii. 



AJinilies of letteis. Vol. III. p. 292. 



Ages of perfons in America and Europe compared together, Vol. III. p. 



43. 54. 56- 

 remarkable of certain perfons. Vol III. p. 44. 



Agriciiltura/ effaja. Vol. I. p. 118 to 224, 241, 255. 



Agriculture the iburce of American profperity. Vol. III. p. vii. 



^ certain purfuits in, recommended, Vol. III. p. viii. 



Air lighter than fmoke. Vol II. p. 2 — how beft conduced into chim- 

 nics, 8 — advifable way of admitting it into rooms, 9 — vulgar pre- 

 judices againft, 21 — whether moift or dry, its free circulation recom- 

 mended, 21 — night ail not unwholefome, ibid. — unhealthy only 

 Vi'hen charged with putrid vapours, 22 — curious current of in chim- 

 nies explained, and its ufes fuggefted, 30 — proved to be more humid 

 in France and England than Am.erica, 53 to 55 — purified by the wil- 

 low tree, 209 — refiftence of, 296 — its capability of extreme denfity. 

 Vol. III. p. 64 — on the evaporation of, 126 — how affected by lieat. 

 Vol. I. p. 273 — application of a machine for preferving its due tem- 

 perature in hofpitals, &c. 289 — the feclufion of air requifite in pre- 

 ferving wine and cidtr, 184 — Prieftley's experiments and obfervations 



relating 



