572 
INDEX. 
Triganometyy,\^'p\\ev\c 7 \ calculations in it abridged, p. 470. 
TftHp.c, roots of, have a power of generating heat, 451. 
U. 
Upper Auvergne^ in France, x city and totvn there built on giants caufeways, p. 
16. 
Uamhlliy figurc"of the Bucciauni in his treatife Dc Thermis Patavinis, inaccurate, p. 46. 
Uarro, his childiih rule for prediifting the weather, p. 183. 
Faud, in Switzerland, average of deaths there for ten years, 428. 
Frgctullcs^ experiments on, with regard to their power of producing heat, p. 430— 
438. Muft be deprived of the principle of vegetation, before they can be frozen, 
p. 434. Their internal temperature fufceptible of great variations, ibid. Their power 
of producing heat, on what it depends, 454. 437. By what princijrles they arc 
adapted to different climates, p. 433. Texture of vegetables much changed by lofs of 
life, ibid. Roots capable of refilling cold more than the flems, ibid. In what vege* 
tables and animals differ, p. 436. 
Velay, in France, bafaltine hills there, p. 9. ii, 12. 14. ai, 22. A church built on a 
rock of lava, p. 39. Bafaltine hills of Velay moflly terminated by regular convex fum- 
mits, which form a folid mafs, p. 22. 
Fenda mount, height of, p. 34. 
Fenetlan State, two giants caufeways, and other curious vulcanic concretions, difeovered 
there, p. 3. See Bafaltes, Rojfo, Diavolo. 
Fefuvius, the infide of the funnel preferves veftiges of its primary organization, p. 28. 
Conjcdlure concerning an original mountain under its Lava, ibid. The whole moun- 
tain not produced by fucceffive eruptions, p. 29. 
Vicentbie mA Ferojiefe, vulcanic mountains, p. 24. 26. More frequent in the Vicentinc 
than the Veronefe diflrift, p. 44. 
Vulcanic pha^nomena, abound In the Northern part of Italy, p. 42. Ste Hilh Vulcanic, 
Volcanos of the Andes, conjeiflures concerning, p. 30. Abound in follil Glafe, p. 40. 
W. 
Wales^ mountain of, fuppofed to contain prifmatic bafaltine columns, p. 16. 
Wargentin, Mr, his obfervations of the occultations of <* and y Taurl, p. 18 1. 
Water ^ impregnated with fixed air, defcriptlon of an apparatus for, p. 59. Operations 
on Dr. Prieftley’s apparatus for this rife p. 59, 60. Part of it offenfive, p. 60. 
Dr. 
A. 
