r N D E X; 
5^4 
Unjfo. II monte Roflb, a bafaltine hifl In the Venetian State, p. 6. A topograplilca-l 
viewof it, • Tab. I. See Bafalits. Singulaiities. of the columns of INIonte RolTo, 
p. 7. 8. 10, II. The mountain formed of an Inferior kind of Granite, which the co- 
lumns re emble, p. 8, ’No linglc columns or Icofe fragments obferved about Monte 
• llolTo/p; 22. The Hill terminated by a regular convex fummir, which forms a 
Iblid mafs, p. 22. Of the phyfical topography and Vulcanic Piodudtions of Monte 
Roflb, p. 36—38. 
S. 
St. Flour., a city in Upper Auvergne, built on a giant’s caufeway, p. 15. Singularities of 
its bafaltine columns, ibid. 
St. MiebaeVs church, at Ptiy, in Velay, built on a rock of lava, p. 39. 
San Biafio., in the Euganean hills, in Italy, a group of angular columns newly difeovered 
there, p. 4 1 8. See Bafaltcs. The rocks of San Biafio abound with ferrugir.eous vitri- 
fications, p. 422. 
San Giovannu See Diavolo, 
San Gothard, account of its parallel ftrata of Granite, p. 422. 
, Sand-Martin, or Bank-Martin, an account of the, p. 472. The leafl: of the Britifh 
birundines, and the fmallefl known hirundo, ibid. They difclaim all domellic attach- 
ments, and delight in wild places and large wateis, p. 272, 273. 275, 276. Built 
tltcir nefts in the bottom of deep holes in the fand or earth, p. 273. Make good dif- 
patch in Icooping thefe holes, p. 273, 274. Leave feveral holes unfinllhed, and con- 
. jeftures concerning them, p. 274. After fome years, they forfake their old holes, and 
bore new ones, ibid. Much annoyed by fleas, ibid. Sometimes dirpofleffed of their 
breeding-holes by the houfe-fparrow, p. 275. Thefe caverns not made ufe of by way 
oi J^hernacula, ibid. They arrive about the fame time with the fwallow, and lay 
from four to fix eggs, ibid. Bring forth their young rather fooner than the fwallows, 
ibid. Thefe hirundines no fongfters, ibid. Breed twice, and withdraw about Mi- 
chaelmas, p. 276. Much the rarefl fpecies in the fouth of England, ibid. Peculiar 
manner of flying, ibid. The flight of all hirundmes influenced by, and adapted to, 
the peculiar fort of infe£fs which furnifh their food, ibid. Sand-Martin differ from 
their cotigeners In diminutivenefs and colour, ibid. Sold in Spain for the table, and 
CTiWt A papi lion de montagna. See Houfe-S^vallovo, Swift . 
SaJJa, p. 414. 
Saturn’s ring, obfervations on its fecond difappearance and re-appearance again, p. 294, 
zgs. 
Scaglia, or Scagliola, p. 34. 
Scbchallien, the mountain, an account of obfervations made on, for finding its attraiffionj 
p 300. Every thing neceffary for carrying the defign into execution prepared, p. 500, 
|oi- A tour made to find the bed hill for the experiment, p. 502, 503. This 
mountain 
