I N D E X. 
H. 
Hamilton , Hugh, D. D. his letter, demonftrating the 
properties of the mechanic powers, with obfervati- 
ons on the methods commonly ufed for that pur- 
pofe, p. 1 03. 
Hazardous way of taking fwallows, p. 10 1, 
Heart , account of a blow upon it, p. 353. 
Heat , whether any in eledtric fire, p. 89. 
Hemlock , green, account of a cafe, when it was happily 
tried, p. 346. . 
Hirjly Rev. Mr. an account of an earthquake at Chatti- 
gaon, communicated by him, p. 251. — His account of 
an earthquake in theEaft Indies, and of two eclipfes of 
the Sun and Moon, obferved at Calcutta, p. 256. 
Horne> Mr. Henry, his obfervations on fand-iron, p. 48, 
Horfe-race , eledtrical, p. 89. 
Horfeley , Mr. miftaken in the meaning of the word equi- 
tata, p. 137. 
Hornfby , Rev. Mr. his obfervations on the parallax of the 
Sun, p. 467. 
Huxham , Dr. his letter on two remarkable cafes in fur- 
gery, p. 231. 
L 
Infcriptions , Etrufcan, p. 127.— .Roman, at Durham, p. 
j 26. Very curious, at Tunis, p, an.* Punic* 
p. 274. 
InfeH, remarkable marine, p. 57. 
Iron , made from the Virginian black fand, p. 48. — And 
the excellence of fuch iron, p. 58. 
Iron-conduttor , inftance of it*s great utility in thunder- 
ftorms, p. 94, 
Keih 
