[ 1092 ] 
Shucklurgh , Sir George, comparifon between his and Colonel Roy’s rules for the mea- 
furement of heights with the barometer, p. 681. See Barometer . 
Eighty concerning its organ, p. 91 — 94. Rev. Mr. Michael Lort’s letter concern ing 
a remarkable imperfection of fight in regard to colours, p. 61 1. A family diforder, 
p. 612 — 6x4. 
Simi a gibbon of Sumatra, a defcriptian of it, p. 170. 
Skin of the dog-hfh, very ufeful in cleaning electrical cylinders, p. 86 r, 862. 
Small-pox^ fatal in early infancy, p. 143. The proportional fatality of the natural 
fmall pox in' Chefter in the year 1774, p* 142* 143 . 143. 148. Deaths by the 
fmall-pox during the fame year, p. 1 30. Deaths by the fame diforder under one 
year old in the fame year, ibid. General Rate of the fmall-pox there during that 
year, p. 1 5 1 . 
Smells. Volatile alcali the molt ufeful to obviate bad fmells, p. 209. 
Snail , experiment on one relative to its heat, p. 26. Why fnails live under large ftone3 
and in holes in the winter, p. 32, 33. 
Snow keeps the earth warm, p. 33. Snow one of the worft conductors of heat. 
p. 33 ,«. 
Soils. Experiments on the effects of the effluvia from moift, marfhy, and other kinds 
of foils upon air, p. 210 — 217. 
Solids. Concerning the meafure of the expanfion of folids by heat, p. 419 — 353. 
Sombrero. A defcription of the wonderful plant of Sombrero , p, 178. 
Souring prepared from ftrong fpirit of vitriol the bell for tanners, p. 125, 126. How 
to prepare it, p. 126. 
Sour-krout, very ufeful in the cure of the fcurvy, p. 663, &c. ' . 
Spirit of vitriol, the bed fouring for tanners made from it, p. 125, 126. How to 
prepare it, p. 126. 
Springsy hot and cold, in the valley of Furnas, an account of .them, p. 6© 4 — 607. 
Perfons cured of virulent diforders by thefe waters, p. 607, 608. 
Squinting . A new cafe in fquinting, p. 86. A lad’s particular method of viewing ob- 
jects, p. 86,87. His fquinting occafioned by bad habit, p. 87, 88. Method of 
cure, p. 88— -90. 96. Squinting perfons have one eye much lefs perfect than the 
other, p. 90. How they may be cured, ibid. Covering a weak eye generally the 
caufe of fquinting, ibid. Concerning the organ of vilion, p. 91 — 94. Conje&ures 
relating to the above unufual mode of fquinting, p. 94—96. 
St. Miguely the ifland, an account of it, p. 601. Its produ&ions of a nearer affinity 
to Europe than Africa, p. 601, 602. Its fize, p. 602. An account of Ponta del 
Guda its capital, p. 602, 603. Country round it fertile and well cultivated, p. 603. 
Some account of Ribeira Grande, ibid. Of Villa Franca, p.603,604. Of the 
Furnas, and its hot and cold fprings, p. 604 — 607. Perfons cured of virulent dif- 
orders by thefe waters, p. 607, 608. Some account of Sete Cidades, p, 608, 609. 
St ok*' 
