INDEX. 
Short {James) M. A. his obfervations on the comet feen in 
January 1760 — 1 — — Page 465 
Silk-reel , a new-improved one — — 21 
Silk-pod , or Cocoon, account of a particular fpecies from 
America — — — — 54 
Silk (black and white) concerning the eledricity of it — 
340— 3 48 
Sirius , a propofal for difcovering the annual parallax thereof 
889 
Siyah-ghujh , or Black-ear, defcription of an animal fo called 
650 
Smeaton (Mr. John) his experimental inquiry concerning 
the natural powers of water and wind to turn mills and 
other machines depending on a circular motion, 100--174 
Solid, fedions thereof hitherto not conhder’d by geometers 
446 
Specimen of the labour of a kind of bees 844 
Stars , remarks on their mutations — — 494 
Stones , account of two, of a remarkable fhape and fize, cut 
out of the urethra of a young man 304 
Stony concretion , account of one taken from the colon of an 
horfe — — — 694 
Storm of thunder and lightning , account of one at Norwich 
on July 13, 1758 — — ‘ — — %% 
- — . — , account of the effects of 
one at Rickmanfworth, on July 16, 1 759 — 282 
Strata of the earth , regular and uniform 582 
Subterraneous fires, the probable caule of earthquakes 569 
Succcfs of fome experiments concerning the encauftic paint- 
ing of the ancients — — 53 
Sulphur , concerning the exigence of it in fome mineral 
waters — — — — 2 75 
Sums of certain feries , new method of computing them 533 
Suppreffion of urine, cafe of a very long one — — — 215 
Surinam , account oi the frog-fifh thereof — 653 
Swallows, concerning their migration — — * 459 
Swinton (Rev. John) B. D. his conjedures on an inedited 
Parthian coin — • — 
Swinton , 
