INDEX. 
page 
New Holland and New South Wales, in the years 1801, 
1802, and 1803, - - - 239 
Force of percussion, lecture on, - * - 13 
, mechanic, defined - - - ‘16 
of horses, various, - 22 
— — , centrifugal, its effect on the growth of seeds, - 102 
G 
Gilpin, Mr. George. Observations on the variation, and 
on the dip of the magnetic needle, made at the apartments 
of the Royal Society between the years 1786 and 18 05 , 
inclusive, - - - - - 385 
Gompertz, Mr. Benjamin. Application of a method of 
differences to the species of series whose sums are obtained 
by Mr. Landen by the help of impossible quantities, - 147 
Gravitation , its influence on the growth of plants, - 100 
Griffiths. J. Esq,. Description of a rare species of worm- 
shells discovered at an island off the north-west coast of 
Sumatra, - - - 269 
Guaiacam, experiments on, - - - "89 
, yields extractive matter to water, - go 
, powerfully acted on by nitric acid, - 93 
, yields oxalic acid, - - ib. 
- — — , its oxides blue or green, - * =92 
H 
Halley , Dr. his theory of variation referred to, - 352 
opinion of the importance - - 398 
Hatchett, Charles, Esq,. Third series of experiments on 
an artificial substance which possesses the characteristic 
properties of tannin, - - - 109 
observations on Mr. Brande’s ex- 
periments on urine, - - - - 372 
H erschel, William, LL. D. On the velocity of the solar 
motion, - - - - 205 
— — — — — Observations and remarks on 
the figure, the climate, and the atmosphere of Saturn and 
its ring, - - - 455 
Home, Everard, Esq,. An account of a small lobe of the 
human prostate gland not before taken notice of by anato- 
mists, - - 195 
