INDEX. 
and olefiant gas, 275 — of hydrogen, carbonic oxide, carburetted 
hydrogen and olefiant gas with oxygen, 276. 
Gases, combustibility of, 277— -order of their efficacy in diminishing 
the action of the platina sponge, 282. 
Gasteropoda, fossil, occur in beds which immediately follow those 
containing unknown orders of mollusca, 414. 
Gold possesses no electro-mechanical influence in alloy with 
mercury, 184. 
Greenwich, latitude of, 81. Catalogues of 1813 and 1823 com- 
pared with those of Dublin, 80 — observations at, with mural 
circle discussed ; vide Brinkley, Pond, parallax, mural circle. 
H 
Hammering renders iron and steel magnetic, 197 — most effectual 
when the bar hammered rests on a mass of iron, 197. 
Harvey, George, Esq. on the distribution of magnetism in ships 
of war, 310, 353. 
on the effects of the density of the air on the rates of 
chronometers, 372. 
Hedge-hog , effect of hibernation on, 15. 
Helicon gun brig, distribution of magnetism in, 324. 
Henry, Dr. William, on the action of finely divided platinum on 
gaseous mixtures, and its application to their analysis, 266, 289. 
Herschel, J. F. W. Esq. on certain motions produced in fluid 
conductors when transmitting electricity, 162 et seq. 
re-examination of double stars begun by, in 1816. Part 
iii. 3. 
and James South, Esq. observations of 380 double and 
triple stars, Part iii. 1 et seq, 
Sir William, motion of double stars about each other 
discovered by, Part iii. 2 — unpublished observations of double 
stars, by, iii. passim and20 — reasons for deviating from his catalo- 
gues, iii. 20— his catalogue of 145 double stars, Part iii. passim. 
Hibernation of birds , arguments against, 14, &c — of hedge-hog, 
effects of, 15 — hypothesis of B eddoes in favour of, considered, 18. 
Hobby-haivk seen 100 leagues from land, 13. 
Home, Sir Everard, Bart, on the internal structure of the human 
brain, 1 — on the walrus and seal, 233 — on the organs of genera- 
tion of the axolotl, 419. 
Hoopoe caught in the Atlantic several hundred miles from land, 13. 
Huddart, Capt. devises and superintends the construction of Mr. 
South’s Equatorial, Part iii. 11. 
