INDEX. 
Satellite , concerning the irregularities in the motion of one, 
arifing from the fpheroidical figure of its primary planet, 
p. 807. 
Sea-water , method of making it frefti with wood-afhes, 
p.635. 
Sea Alga with broad leaves, observations on it, p. 63 1. 
Series, invention of a general method for determining the 
fum of every 2d, 3d, 4th, 5th, &c. term of one, taken 
in order, p. 757. 
Serapis , Temple of, at Pozzuoli, account of it, p. 1 66. 
Sbepey Ifiand, account of fofiil fruits, and other bodies, 
found there, p. 396. 
Short, James, M. A. his account of fome experiments 
concerning the different refrangibility of light by Mr. 
John Dollond, p. 733. 
Shefford , Great, extratt of the parifh regifter there, with 
obfervations, p. 356. 
Simp fort, Mr. Tho. his refolution of a general propofition 
for determining the horary alteration of the terreftrial 
equator, &c. p. 416. 
further attempt to facilitate the re- 
folution of ifoperimetrical problems, p. 623. 
. invention of a general method for 
determining the fum of every 2d, 3d, 4th, or 5th, &c. 
term of a feries, taken in order, p. 757. 
Skeleton of an animal, defeription of a foffil one found in 
the alum rock near Whitby, p. 786. 
Slates of Coals, account of the impreffions of plants on 
fome, p. 228. 
Sleep of plants, observations on it, p. 506. 
Smeaton , Mr. John, concerning the effetts of lightning 
upon the church and fteeple of Leftwithiel in Cornwall, 
p. 198. 
his remarks on the different tempera- 
ture of the air at Edyflone, from that obferved at Ply- 
mouth, between July 7th and 14th, 1757,^.488. 
Snail , the naked, producing purple, observations on it, p. 
585. 
