INDEX. 97 



Remarks on, 100. Produced by friction of a solid against a 

 liquid, XV. 1G2 



Heat, solubility diminished by, xvi. 165 



on the radiation of, in the atmosphere, xviii. 305 



and light from terrestrial sources, observations on, xix. 45, 



64, 213 



Heated bodies, repulsion exerted by, at certain distances, xx. 1C4 



Heavenly bodies, observations on the apparent change in the 

 place, colour, size, and figure of, x. 9 



Heavy bodies, supplement to a paper on the vibrations of, xx. 69 



Hebrew medal, of ancient brass, discovered in Ireland, vi. 382 



Hebrides (islands), geology of, xiii. 192 



Hedwig (John), life of, i. 103. Birth and early education, 104. 

 Progress of his botanical studies, 105. Removes to Leipsic, 

 108. Publishes his discoveries on cryptogamous plants, 109. 

 Appointed professor of medicine, ih. List of different trea- 

 tises published by him, 110. His character, 112. 



Heinrich (M.), experiments and observations of, on phosphores- 

 cence, xi. 399 



Hellebore (black), analysis of the roots of, xiii. 150 



Hematitic iron ore, recent formation of, xx. 187 



Hemp-seed, sowing of, a preventive of the depredations of cater- 

 pillars, xiv. 238 



Henderson (Dr.), analysis of his History of Wines, with re- 

 marks, xviii. 117 



Henderson (Mr.), his improved method of computing an ob- 

 served occupation, xviii. 344 



on a method of computing the sun's horizontal paral- 

 lax, from observations of the transits of Venus, xx. 94. Ob- 

 servations on the method of computing the true from the appa- 

 rent lunar distance, 315. Occultations of the planets and fixed 

 stars, not less than the fourth magnitude, visible at Greenwich 

 in 1S2S, 325 



Hendrick (Robt., Esq.), evidence of, in the cause of Severn and 

 Co. against the Imperial Insurance Company, x. 33G 



Hennell (Mr.), experiments of, on mercury, xviii. 295, 



H 



