426 



cutta, Madras, and Bombay, ii. 176, 

 177 ; on the difference of longitudes 

 found by chronometer, and by cor- 

 responding eclipses of the satellites 

 of Jupiter, ii. 177 ; on the velocity of 

 sound, ii. 188. 



Gompertz (B.), analysis and notation 

 applicable to the estimation of the 

 value of life contingencies, ii. 1.32; 

 application of a method of differences 

 to the species of series whose sums 

 are obtained by the help of impossi- 

 ble quantities, i. 224 ; on the func- 

 tion expressive of the law of human 

 mortality, and new mode of deter- 

 mining the value of life contingen- 

 cies, ii. 252. 



Goniometer, reflective, i. 337. 



Gout, on the effects of Colchicum au- 

 tumnale on, ii. 41, 42, 71. 



Granville (Dr. A. B.) on Egyptian 

 mummies, and on the art of embalm- 

 ing, ii. 240 ; on a mal-conformation 

 of the uterine system in women, ii. 

 95 ; case of the human foetus found 

 in the ovarium, ii. 123. 



Graves (J. T.), an attempt to rectify 

 the inaccuracy of some logarithmic 

 formulae, ii. 365. 



Gravity, on the feet of those animals 

 whose progressive motion can be 

 carried on in opposition to, ii. 38, 51 . 



Greatorex (Thomas) on the heights of 

 mountains in the North of England, 

 ii. 97. 



Greenwich Observatory : corrections 

 in the elements of Delambre's solar 

 tables, required by the observations 

 made at, ii. 328 ; on the derange- 

 ment in the mural circle at, ii. 160. 



and Altona Observatories, 



difference in the number of vibra- 

 tions made by an invariable pendu- 

 lum at these two places, ii. 403. 



and Dublin Observatories, 



on the instruments at, ii. 222. 



and Paris Observatories : 



on the difference of meridians of, ii. 

 261, 319; trigonometrical operations 

 for determining the difference of 

 longitude between, ii. 335. 

 Gregor (Rev. W.) on a mineral sub- 

 stance formerly supposed to be zeo- 

 lite, with remarks on two species of 

 Uran-glimmer, i. 209 ; on a native 

 arseniate of lead, i. 331. 



Gregorian telescope compared with the 

 Cassegrainian, i. 468, 493. 



Greville (Right Hon. Chas.), account 

 of some stones said to have fallen in 

 France, and of a lump of native iron 

 said to have fallen in India, i. 109. 



Griffiths ( J.), description of a rare spe- 

 cies of worm-shells, i. 233. 



Groombridge (S.) on atmospherical re- 

 fraction, as it affects astronomical 

 observations, i. 371, 500; astronomi- 

 cal observations, ii. 135. 



Gryllotalpa, description of the organs 

 of respiration of, ii. 237. 



Guaiacum, experiments on, ii. 216. 



Guyton de Morveau (M.), observations 

 on his proposal for a pyrometer, ii. 

 404. 



H. 



Hall (Capt. B.), observations of a comet 

 seen at Valparaiso, ii. 158; experi- 

 ments with an invariable pendulum, 

 ii. 193. 



Harding (Mr.), nature and magnitude 

 of the star (Juno) discovered by, i. 

 170. 



Harris (W. S.) on the powers of me- 

 tallic substances as conductors of 

 electricity, ii. 298. 



Harvey(G.), experiments relative to the 

 distribution and changes of the mag- 

 netic intensity in ships of war, ii. 218 ; 

 of the effects of the density of air on 

 the rates of chronometers, ii. 220. 



Harwood (I.) on a newly-discovered 

 genus of serpentiform fishes, ii. 302. 



Hatchett (C.), experiments on zoo- 

 phytes, andonthecomponent parts of 

 membrane,!. 25; analysis of'a mineral 

 substance from North America con- 

 taining a metal hitherto unknown, i. 

 67 ; on the various alloys, on the spe- 

 cific gravity, and on the wear, of gold, 

 i. 105 ; analysis of a triple sulphuret 

 of lead, antimony, and copper, i. 138 ; 

 experiments and observations on lac, 

 i. 148; analysis of the magnetical 

 pyrites, with remarks on other sul- 

 phurets of iron, i. 155 ; on the change 

 of some of the proximate principles 

 of vegetables into bitumen, and on a 

 substance which is found with the 

 Bovey coal, i. 159 ; remarks on coal, 

 i. 159,223 ; on an artificial substance 

 possessing the properties of tannin, 



