INDEX. 421 



Glass, impermeability of to water, 168 



Gold trinkets, suggestion for cleansing, 179 



Grain, contrivance for the preservation of, 166 



Gregory (Dr.,) results of experiments of, on the velocity of sound, 



162, 163 

 Groombridge (Mr.,) researches of, on the theory of atmospherical 



refractions, 365-367 

 Guibourt (M.,) abstract of his facts towards the chemical history 



of mercury, 291-295 

 Guienne, notice of the wines of, 129 



Hail-stones, form of, 411 



Hancock (Dr.,) account by, of the native oil of laurel, 47-50 



Harvey (George, Esq.,) observations of, on the effects of the in- 

 duced magnetism of an iron shell, on the rates of chronometers, 

 34-47. Results of his experiments relating to the comparative 

 means of defence afforded by ships of war having square and 

 curvilineal sterns, 201-223 



Heart, observations on the motion of, 223-228 



Heat, on the radiation of, in the atmcsphere, 305-312 



Henderson (Dr.,) analysis of the history of wines by, with remarks, 

 117-135 



■ (Mr.,) improved method by, of computing an observed 



occultation, 344-347 



Hennell {Mr.,) experiments of, on mercury, 295-297, notes 



Holy-Well Water, near Cartmel, analysis of, 188 



Home (Sir Everard,) observations of, on the internal structure of 

 the human brain, as compared with that of fishes, insects, and 

 worms, 136-138. His reply to Dr. Bostock, 290,291. His 

 discovery of nerves in the foetal and maternal placenta, 323, 

 324. On the changes which the ovum of the frog undergoes 

 during the formation of the tadpole, 324 



Humboldt (M.,) account of the volcano of Purace, 404-406 ; and 

 of the sulphur mountain of Ticsan, 406, 407. On obsidian, thrown 

 out by the volcano of Sotara, 408. On the form of hail»stones, 

 411,412 



Hungary, wines of, 131, 132 



Hydrocyanic acid, the oxalate and formiate of ammonia concreted 

 into, 397. How it may be detected in the bodies of animals 

 poisoned by it, ibid. 398, 399 



Hydrogen, pure, process for obtaining, 180. Eruption of sul- 

 phuretted hydrogen, 188. Experiments on the decomposition of 

 metallic sulphates by, 392-394 



Hydrophobia, excision of the bitten part, in what case an effectual 

 preventive of, 111. Remarks on the different plans of treatment 

 hitherto proposed, 112-115. Suggestions of Dr. Bath for the 

 treatment of this malady, 115-117. The hydrophobic poison 

 said not to be conveyed after its first transmission, 412 



