C 6o 5 ] 
A N 
I N D E 
TO THE 
SEVENTIETH V O L U M E 
OF THE 
PHILOSOPHICAL TRANSACTIONS. 
sicias . 1 iie moit powerrui mineral acnis ao not leflfen the adivity of the pot- 
fon of vipers, p. 181. Mineral acids leffen the a&ivity of thepoifon of Ticunas, p* 
182. But are no remedy againft it, p. 184. 
Agriculture . Confiderable improvements in, p. 345. 352. 
Air. At fea examined by the nitrous teft, p. 354. At Gravefend by the fame, p. 3 36. 
Apparatus for examining its falubrity at fea, p. 356. Some experiments on its falu- 
brity on land, p. 3 59. How to afcertain whether leaves contribute to its falubrity, 
p. 362. Eftimate of the falubrity of that at Ohend, p. 366* 368. And at Bruges, 
ibid. And at Ghent, ibid. At Brulfels, p. 369. And at Antwerp, ibid. And 
Breda, ibid. And Rotterdam , p.370. And of that of the Moor-dyke, ibid. And 
of Delft, ibid. And of the Hague, ibid. And of Amfterdam, ibid. And of Rot* 
terdam, ibid. And of a lake near Rotterdam newly drained, p. 372. And of Hol- 
lands Dieppe, p. 3,73. And of various other places in France and Flanders, p. 374. 
Oblervations and experiments on the comparative temperature of hoar-froft, and 
the air near it, p, 451. 470. Very cold, not often difpofed to depolit its contents, 
except upon bodies as cold or colder than itfelf, p. 47 r. 
Algelra. Pleafure of confidering how peculiar methods in, were firfl difcovered, 
•. 222. 
