INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1851. 
A. 
Airy (G. B., Esq., Astronomer Royal). On the Relation of the Direction of the Wind to the 
Age of the Moon, as inferred from observations at the Royal Observatory, Greenwich, from 
1840 November to 1847 December, 41 1. 
Alizarine, one of the products of rubian, 447. The true colouring matter of madder, 459. 
Ammonia, on the oxidation of, in the human body, and on nitrification, 399. Experiments with 
carbonate of ammonia, 401 ; with liquor ammoniae, 403; with tartrate of ammonia, 404; with 
muriate of ammonia, 405 ; with urea, 406. 
Amphibia, on the impregnation of the ovum in, 169. 
Amylamine, 384; action of bromide — 385, and of iodide of amyl upon, 387. 
Animal Chemistry , contributions to, 399. 
Annual variation of the magnetic declination at various periods of the day, 635. 
Appendicularia and DoUolum, anatomy of, 595. 
Archipelago, Eastern, Magnetic Survey of, 287. 
Atmospheric magnetism, 43-85. 
B. 
Bakerian Lecture, the, 1. 
Beechey (Capt. F. W., R.N.). Report of further Observations upon the Tidal Streams of the 
North Sea and English Channel, with Remarks upon the Laws by which those Streams appear 
to be governed, 703. 
Bodies, gaseous, non-expansion of, by magnetic force, 7. 
Bodies, magnetic condition of, 7. 
Bronwin (Rev. Brice). On the Solution of Linear Differential Equations, 461. 
5 F 
MDCCCLI. 
