INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1829. 
A. 
Abrasion. Experiments on the resistance to abrasion of the surfaces of solids under different 
circumstances of pressure and velocity, 159. 
Allen (William, Esq.). On the respiration of birds, 279 et seq. 
Aurora Borealis. Description of several in Aberdeenshire, 105 et seq. 
Its height above the earth discussed, 113. 
B. 
Barium. On the composition of its chloride, 291 et seq. 
Barlow (Peter, Esq.). His account of a refracting telescope of 7.8 inches aperture, with 
a fluid concave lens, 33 et seq. 
Barometer. A differential barometer described, 133 et seq. 
Bell (Charles, Esq.). On the nerves of the face, 317 et seq. 
Bevan (Benjamin, Esq.). Experiments on the modulus of torsion, 127 et seq. 
Birds. More sensible than other animals to the stimulus of oxygen, 286. 
Bostock (John, M.D.). On the spontaneous purification of Thames water, 287 et seq. 
Brewster (David, LL.D.). On the reflection and decomposition of light at the separa- 
ting surfaces of media of the same, and of different refractive powers, 187 et seq. 
On a new series of periodical colours produced by the 
grooved surfaces of metallic and transparent bodies, 301 et seq. 
C. 
Calculi. Analysis of several belonging to the Norfolk and Norwich Hospital, 69 et seq. 
Chinese female foot. Its anatomical description, 255 et seq. 
Colours. Table of colours produced at the separating surfaces of plate glass and various 
oils and other fluids, 196. 
