7 - 
608 
INDEX. 
1 
S. 
Sabine (E.). Contributions to Terrestrial Magnetism. — No. XII. The Magnetic Survey of the British 
Islands, reduced to the Epoch 1842’5, 265. 
Silicates, a new method of analyzing, 191. 
Silver, fluoride of, 227. 
Skull, human, variations of, 117 (see Cleland). 
Sky, blue colour of the, 347. 
Spottiswoode (W.). On the Contact of Conics with Surfaces, 289. 
Stewart, (B.) (see De La Rue). 
Strutt (J. W.). On the Values of P Q„ Q„,, dy., Q„, being Laplace’s Coefficients of the Orders n, ri, 
with an application to the Theory of Radiation, 579. 
Sun-spots, 389 (see De La Rue). 
Sylvester (J. J.) (see Ferrers). 
T. 
Tangents of more than two-pointic contact with plane sections of surfaces, 305 . 
Temperature, stationary, of a sphere exposed on one side to radiation, 587. 
Thermo dynamic theory of waves of finite longitudinal disturbance, 277. 
Thorpe (T. E.) (see Roscoe). 
Tyndall (J.). On the Action of Rays of High Refrangibility upon Gaseous Matter, 333. 
V. 
Vanadium, 317 (see Roscoe). 
W. 
Waves of finite longitudinal disturbance, thermodynamic theory of, 277. 
Wheatstone (C.). Description of a case of Hemiopsia, 253. 
Wood (J.). On a Group of Varieties of the Muscles of the Human Neck, Shoulder, and Chest, and 
their transitional Forms and Homologies in the Mammalia, 83. 
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