INDEX. 
Halley Dodtor, his obfervations of the latitude, and longi- 
tude of St. Helena, p. 153. Why thefe obfervations 
are not to be depended on, ibid. 
He and Mem, two Phoenician letters. Remarks on them, 
p. 125. 130. 394. 399. 401. 
Heberden , W. M. D. his account of the effects of light- 
ning, p. 198. 
Hemlock , extracts of obfervations on them, by Michael 
Morris, M. D. F. R. S. p. 172. How different fome 
of thefe from others, 174. Flow uncertain where their 
virtues refide, 176. 
Hernia , an account of one in the urinal bladder, by Mr. 
Pott, F. R. S. p. 61. A particular defeription of it, 62. 
How an incifion into it was made, 63. And how 
cured, 64. 
Heth and Beth, two Phoenician letters remark t on, p. 
416. 
Hirjl , Mr. his obfervations at Fort St. George, p. 155. 
Hornfiy Thomas, M. A. Savilian Profeffor of Aftronomy, 
at Oxford, his obfervation of the fun’s horizontal diame- 
ter, p. 148. His account of the fun’s eclipfe, 1 Ap. 
1764. 145. 
Horjley , Mr. John, his method of finding the Longitude at 
Sea, p. 329. By what inftrument his obfervations were 
made, 332. 
Howard , John Efquire, F. R. S. his account of an ex- 
traordinary degree of cold in Bed ford fh ire, p. 1 1 8. 
Hygrometer , a defeription of one invented by James Fer- 
gufon, F. R. S. p. 259. How it may be mended, 
260. 
Hyperbolas conjugate. New properties of polygones, def- 
cribed wi'hin them demonftrated by Mr. Waring, p. 
1 94 * 
.Hyperboloides conjugate. Properties of folids, deferibed 
within them never before obferved, p. 197. 
I. Jaculator , 
