1 N D F. X. 21 



Femvick's !fle and Chefapeak bay, 91 — alio to lighthoufe on Cape Hcn- 

 lopen, 93-=:— its lat. and Ion. 92, 96. 



h'lfe (human) on the probable duration of, Vol. III. p. 25, 134. 



Light and l)eat, Franklin's new and curious theory of, Vol. III. p. 5 — both 

 are fublhinces. Vol. IV. p. 11. 



Light of comets proceeds from the fun, Vol. I. appendix p. 28. 

 i — aftonlihing velocity of, ib. appendix 36. 



Light-houfe on Cape Henlopen, its lat. and Ion. Vol. I. p. 92, 96. 



——^ at Cape Henry (Vir.) defcribed, Vol. IV. p. 442 — its ftair-cife 



faulty, ib. 



Lightning and thunder ftorms, theory of. Vol. II. p. 74. 



— — account of houfes ftruck by. Vol. HI. p. 119, 122 — ^ whe- 

 ther conduced by heat, or its rarefying etfcift ? 121 — how to guard 

 lliips againft. Vol. II. p. 302. 



rods, or conduiftors, an improvement propofed in the conflruiflion 



of. Vol. III. p. 125 — another improvement, 321. 



Limcjlone, intermixed with flint and marine petrifaftions on L. EritS Vol. 

 IV. p. 226. 



Lion, dimenfions of a large one, as taken by M. de Buffon, Vol. IV. p. 

 248 — a larger one ftill, prefimied to be a native of America, 252 — its 

 figure fuppofed to be cut on a rock upon the Kenhawa, 253 — prefump- 

 tive proofs of his exillence, ib. — curious particulars concerning the 

 lion, 25'4. 



Liriodendron tuUp'ifera [tulip-tree] how affefled by camphor infufed in water, 

 Vol. IV. p. 232. 



Lijl of die officers and members of A. P. S. Vol. I. p. xii. — Vol. II. p. 

 xxiv. — Vol. III. p. xxviii. — Vol. IV. p. xiv. 



Lizard point (G. B.) account of die tranfit of Venus and eclipfe of the fun, 

 as obferved there in 1769, Vol. I. p. 114 — longitude of, 116. 



LocieJ jciiv, preventive for. Vol. II. p. 228. 



Logarithm of any number (common) Rittenhoufe's mode of raifmg it imme- 

 diately. Vol. IV. p. 69. 



London, proportion of deadis in. Vol. III. p. 40 — table of the duration of 

 human life there, 5 7 . 



Longevity, comparative degrees of. Vol. III. p. 38 — particular inftances of 

 in the United States, 44 — inftances elfewhere, 5c. 



Longitude of Philadelphia and Norriton obi'ervatories, Vol. I. p. 5, 59, 



93. 96- 



oi Lewes, Vol. I. p. 92, 96. 



of Providence (N. Eng.) and Cambridge (do.) Vol. I. p. 103. 



of the Lizard point (G. B.) Vol. I. p. 116. 



and latitude, meafurement of die difference of, between Philadel- 

 phia and Norriton obfervatories. Vol. I. appendix p. 5. 



of the town of Natchez, Vol. IV. p 451 



Looming, obfervations on the phenomenon of. Vol. III. p. 62. 



Larimer (Dr.) his obfervations on W. Florida, Vol. I. p. 250. 



Lukcns (John) his account of the contains in the tranfit of Venus over the 

 fun. Vol. I. p. 28. 



Lunar eclipfe, obfervations on one, Nov. 2d 1789, Vol. III. p. 150. 



4 C 2 Machine 



