INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1850. 
A. 
Aden, Hourly readings of the Barometer at, 318 ; range of temperature at, 333. 
Albumen of Eggs, on the freezing of, 221. 
Algebraic expression of the number of partitions of which a given number is susceptible, 399. 
Alkaloids, artificial, on the nitrogenated principles of vegetables as the sources of, 47. 
Ammonia, salts of, diffusion of, 25. 
Amyl, Bromide of, its action upon aniline, 115; upon amylaniline, 116; upon ethylaniline, 117. 
Aniline, action of phenyl-alcohol upon, 97 ; action of bromide of ethyl upon, 98 ; action of bro- 
mide and iodide of methyl upon, 113; action of bromide of amyl upon, 115. 
Arctomys Empetra and 'pruinosa, on the dental structures in, 538-539. 
Atmospheric temperature, on the effect of its changes on the temperature of the human body, 442. 
Auditory nerve, development of, 195. 
B. 
Bakerian Lecture, the, 1. 
Barometrical observations in India, 298-321. 
Bases derived from aniline and ammonia, their relation with other groups of alkaloids, 124. 
Belemnite and Belemnoteuthis, supplementary observations on the structure of, 393. 
Bombay, range of Barometer at, 305. Temperature at, 324. Rain at, 353-367. Winds, 369. 
Brodie (Benjamin C., Esq.). On the Condition of certain Elements at the moment of Chemical 
Change, 759. 
Bromaniline, action of bi’omide of ethyl upon, 109. 
Brooke (Charles, Esq., M.B.). On the Automatic Registration of Magnetometers and jMeteor- 
ological Instruments, by Photography, No. III., 83. 
Brougham (Lord). Experiments and Observations upon the Properties of Light, 235. 
MDCCCL. 5 P 
