I - N ' D E X. 
559 
other new and ufeful theorems deduced therefrom, p. ^86 — 289. Obfervations 
thereon, p. 289. 
jLarva abounds in the hills of the Veronefe, p. 24. And in thofe of Auvergne and 
Velay, p. 35. More rare in the Euganean Hills, p. 3^. Found in the Granito 
of Monte RolTo, p. 36. Singular kind of Lava of which Monte Nuovo is compofed, 
p. 38. Lava brecciata, ibid. Lava-pebbles obferved in quantity in the beds of the 
• rivers flowing from the mountains near Friuli, p. 43. 
Leicejler, latitude of, p. 366. 
Loxcl, Mr. an extradt of his letter from Peterfburgh, concerning the occultations of the 
fixed flat s by the moon, p. 280. Two curious theorems, by means of which the folu- 
tion of polygons will be as eafy as that of triangles by common trigonometry, p. 281, 282. 
Life, has a power of producing or deflroying heat, 1 12. 1 22. 
Life, human, obfervations on the difference between the duration of it, in towns 
and in country parifltes and villages, p. 424. The proportion ol inhabitants 
dying annually in great towns, from i in 19 to i in 22 or 23; in moderate 
towns, from i in 24 to 1 in 21 ; in county parilhes and villages, r in 40 or 
50 ; p. 426. Average of deaths at Stockholm for fix preceding years, r ittt 
1 9 annually, ibid. At Rome for ten years i in 2 if annually, p. 427. In London i 
in 2o|, ibid. At Northampton i in 26| die annually, ibid. And in the illand of 
Madeira, for eight years, i in died annually, ibid. A 19th part ot the inhabitants 
of Stockholm die every year; and in the whole kingdom of Sweden, towns and country 
together, not more than a 35th part, p. 427. n. Average of deaths for ten years at 
Valid, in Switzerland, i in 4^ annually, p. 428. In Ackworth, in the county ot 
York, for ten years to 17^7, a 56th part had died annually, and in the year 1767 
the annual average was a 47th part, ibid. Obfervations on this flriking difference 
between the rate of human mortality in towns aiid in country parifhes and villages, 
p. 428 — 434. Surveys in the year 1773 of the inhabitants at Hale, Horvvich, Darwen, 
Cockey IMoor, and Chowbent, in Lancalhire, with the flate of their births and deaths, 
p. 431, 432, 71 . Number of males and females born in different places, afed at different 
periods, p. 435. The proportion of male to femafe births 20 to 19, ibid. Number of 
males living lefs than females, p. 433’, 436. Males more fhort-lived than females* 
p, 436. Inftanced in the parilh of Sr. Sulpice, at Paris, during 30 years ; and in 
Stockholm and the whole kingdom of Sweden during 9 years, ibid. Sweden gain* 
above 20,000 Inhabitants yearly by the excefs of births above deaths, p. 437. The 
order of human mortality in Sweden, p. 438. Obfervations thereon, p. 439. Its 
order at Stockholm, p. 440. Obfervations thereon, p. 4^1. State of human mor- 
tality in the whole kingdom of Sweden and in its capital for 9 years, p. 442. 
Chriflenings and burials in the parilh of Ackworth, in the county ot York, for 20 
years, p. 43.3, 444. Account of the inhabitants of Rome for ii years, p. 443. 
l.rghtning, an account of its eftects on a houfe, which was furniflied with a pointed . 
■conduiflor, at Tenterden, in Kent, p. 336. 
Vox,. LX V.- ,4 JE L'md, 
