C 610 ] 
H. . 
Barmattans , on^he coaE of Guinea, agree with the EaE-wiad of Senegal, p. 489, 
Heati Thermometrical experiments on, 582. Its intenfity does not decreaie in the 
duplicate proportion of the diEance, p. 587. 
Beltings, Mr. Theorems, for computing logarithms, p. 307. 
Hens, Experiments on, with the American poifon, p. 175. Experiments on them with 
the poifon of Indian arrows, p. 180. 
Hermaphrodites. Some account of, p. 529. 
herfchell , Mr. His obfervations on the periodical Ear in Collo Ceti, p. 338. Aftro- 
nomical obfervations relating to the mountains of the moon, p. 507. His method 
of finding the heighth of a lunar mountain, from obfervations made when the is rrot 
in her quadrature, p. 512. Manner in which he made , his obfervations on the 
mountains in the moon, p. 522. 
Bc-velius. Method ufed by him to find the heighth of a mountain in the moon, p. 
30S. His obfervations on the mountains in the moon to be preferred to Galilseo’s, 
p. 317. 
Bill. Calculations to determine at what point in the fide of one, its attraction will be 
the greateft, p. 1. That point found to be generally at about only one-fourth of the 
altitude from the bottom, p. 3. 
Bomber g s pyrophorus not affeCted by light, p. 392. 
Hunter, John. His reflections on the cafe of Mrs. Ford, fuppofed to have commu- 
nicated the fmall-pox to her foetus, p. 131. His account of an extraordinary phea- 
fant* p. 527. 
Button, Dr. Elis calculations to determine at what point in the fide of a hill its at- 
traction will be the greateE, p. 1 . New and important properties of cubic equations 
difeovered by, p. 387. 
j- 
Jones, James. His cafe, p. 323. Continuation of the cafe of, p. 378. 
Japan. Journal kept by Dr, Thunberg during his refidence there, p. 163. 
' I. 
I?igen-Houf% , Dr. His examination of fea air by the nitrous teE, p. 334. 
Indian poifon. Experiments on different animals with arrows impregnated with the, p# 
180. Experiments with poifoned arrows from the EaE-Indies, p. 207. 
Injlrumertt. One for trying the conducing power of the effluvia of burning bodies, p# 
27. And an experiment made w r ith it, p. 28. One to introduce quickfilver into the 
1 nafal 
