INDEX. 
Seftions, Conic, fome new properties in them difcovered 
by Edward Waring, M. A. F. R. S. p. 193. New 
difcoveries relative to Polygones infcribed within them, 
194. 
Seflors , aftronomical inftruments fo called. Their imper- 
fections, p. 350. 
Seligni , Mr. his obfervations at the Ifle of France remarkt 
on, p. 158. 
Shenatb , a Phoenician word. Its import, p. 418. 
Ships, an account of the effects of lightning on them in 
the Eaft Indies, p. 284. 
Short , Mr. his account of the fun’s parallax, p. 283. His 
remarks upon Mr. Mafkeline’s method of making ce- 
leftia! obfervations, confidered by Mr. Mafkeline, 380. 
Siberia , agronomical obfervations made there by Mr. 
Rutnowfki, p. 156. 
Smyrna , why the plague is fo frequent there, p. 76. 
Snails , their fhells how formed according to Mr. Reau 
mur, p. 43. 
Solids , new properties of demonftrated, p. 196. 
Spar , what it feems to be, p. 41. 
Stars, their right afcenfions how exactly found, p. 384. 
St. Brides Steeple, Fleet-ftreet, a curious account of the 
efreCts of lightning upon that fteeple, by DoCtor Watfon, 
p. 209. The firft attack and progrefs of the lightning, 
210. Where it ftopt, 21 1. The damage where done, 
212. A particular defcription of the fteeple, 215. A 
detail of the damage it fuffered, 217. The caufe of 
this misfortune enquired into, 219. 
Steeples, why they fhould not be without an apparatus, 
for preventing the effects of lightning, p. 221. 
St. George Fort at Madrafs. Its latitude and longitude eaft- 
ward of Pondichery, p. 155. 
St. Helena, its longitude weft of the Royal Obfervatory at 
Paris fettled, p 153. The tranfit of venus obferved 
there, ibid. How unfit that place is for aftronomical 
obfervations, 349. Mr. Mafkeline’s obfervations there, 
ibid. 
