838 
INDEX, 
Osmose, 223. 
0 . 
P. 
Pollock (Sir F.). On Fermat’s Theorem of the Polygonal Numbers, 409. 
Polygon, porism of the in-and-circumscribed, 225. 
Polygonal number's, 409 (see Pollock). 
Pratt (Archdeacon). On the Indian Arc of Meridian, 579. 
Propylene, preparation of cyanide of, 65. 
PpGH (E.), sources of nitrogen of vegetation, 431 (see Latves). 
Pidkova, observations on nebulae made at, 738. 
Pyrotartaric add, synthesis of, 66. 
Quaniics, memoir on, 277. 
Q. 
E. 
Radiation of heat by gases, 29. 
Eosse (Earl of). On the Construction of Specula of Six-feet Aperture ; and a selection of the Observa- 
tions of Nebulog made with them, 681. — Construction of specula, 682 ; prospects of utility of large 
specula, 701 ; index to figured nebulae, and explanation of plates, 705 ; observations on nebulae, 709 ; 
comparison of measures with those of M. 0. Struve, 737, 743; Pulkova obseiwations, 738; nebuloe 
not found, 745. 
Eussell (W. H. L.). On the Calculus of Symbols, with Applications to the Theory of Differential 
Ecprations, 69. 
S. 
Salter (S. J. A.). On the Structure and Growth of the Tooth of Echinus , 387. — Description of plates, 
405. 
Simpson (iM.). On the S3mthesis of Succinic and Pyrotartaric Acids, 61. — Preparation of cyanide 
of ethylene, 61 ; action of potash, &c. on it, and formation of succinic acid, 62 ; preparation of 
cyanide of propylene, 65 ; formation of pyrotartaric acid, 66. 
Smith (A.) and Evans (F. J.). On the Effect produced on the Deviations of the Compass by the Length 
and Arrangement of the Compass-Needles ; and on a New Mode of correcting the Quadrantal Devia- 
tion, 161. — New mode of correcting the quadrantal deviation, 167; mathematical investigation of 
the effect of length and arrangement, 169; of the effect of two needles on each other, 174. 
Smith (Dr. E.). On the Elimination of Urea and Urinary Water, in relation to the Period of the Day, 
Season, Exertion, Food, Prison Discipline, Weight of Body, and other Influences acting in the Cycle 
of the Year, 747. — Points for investigation, 751 ; tables of ingesta, egesta, and weight of body, 752; 
results as to urea, 765; urinary water, 769; effect of variations in the ordinaiy dietary, 788; cycle 
of the week, &c., 793 ; contrast of inquiries during two years, 802 ; relations of urea to exertion, 
804; experiments on prisoners, 805; relations of urea to food, 818; of excretion of urea to head- 
ache, &c., 823; of urea and carbonic acid, 824; of ui:ea to nutrition, 825; conclusions, 828; 
resume of facts, 828; points deserving attention, 832; explanation of plates, 834. 
