INDEX. 
page 
angles, and to distinguish the real from the spurious diame- 
ters of celestial and terrestrial objects: with an application 
of the result of these experiments to a series of observations 
on the nature and magnitude of Mr. Harding’s lately disco- 
vered star, - - - - - - 31 
H erschel, William. LL. D. Experiments on apparent mag- 
nitudes of pins heads, 32 
globules of sealing wax, 33 
— of silver, 35 , 44 
— of pitch, bees- 
wax, 8cc. ------ 36 
illuminated globules, 40 
globules ol quicksilver, 48 
On the direction and velocity of the 
motion of the sun and solar system, ... 233 
Observations on the singular figure of 
the planet Saturn, - 272 
Hibernation oj animals, remarks on, - - - 17 
Hoksjsurgh, J. Esq. Abstract of observations on a diurnal 
variation of the barometer between the tropics, - 177 
Hyacinths found among crude platina, - - 318 
I 
Ibis, Egyptian , mummies of, - - - 264 
— — two species, - 269 
Indigo , yields a tanning substance by action of nitric acid, 294 
Iridium , ore of, mixed with crude platina, - - 3 1 7 
Juno, its magnitude estimated by Dr. Herschel, - - 6 1 
K 
Knight, Thomas Andrew, Esq. Concerning the state in 
v loch llm true sap of trees is deposited during winter, - 8S 
On the reproduction of buds, 257 
L 
Lacleals whence they receive their fluids, - - 8 
Lampadius , observations on his formation of sulphur-alcohol, 115 
Lane, Timothy, Esq. On the magnetic attraction of oxides 
of iron, - - - - - - 281 
Leaves contain three kinds of vessels, ... 100 
Lecture , Croonian , ----- l 
Lymphducls arise from cellular membrane, 8 
