INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1870. 
A. 
Aerolites (see Meteorites). 
Air, floating matter of the, 337. 
Airy (G. B.). Note on an Extension of the Comparison of Magnetic Disturbances with Magnetic 
Effects inferred from observed Terrestrial Galvanic Currents ; and Discussion of the Magnetic 
Effects inferred from Galvanic Currents on days of Tranquil Magnetism, .215. 
Airy (H.). On a distinct form of Transient Hemiopsia, 247. 
Aplanatic images, mode of obtaining, in the microscope, 591. 
Australia, fossil mammals of, 519 (see Owen). 
B. 
Bretschneider’s Tables, corrections in, 388. 
British Islands, magnetic survey of, 265 (see Sabine). 
Busti aerolite of 1852, 193. 
C. 
Cayley (A.). A Memoir on Abstract Geometry, 51. 
Chemical intensity of daylight, 309 (see Boscoe). 
Cleland (J.). An Inquiry into the Variations of the Human Skull, particularly in the Antero- posterior 
Direction, 117 (for Contents see p. 117). 
Clouds, blue colour produced by attenuated, 347 ; polarization of light produced by, 347 . 
Contact of conics with surfaces, 289. 
Cretins, skulls of, 166. 
Crofton (M. W.). On the Proof of the Law of Errors of Observations, 175. 
4 p 
MDCCCLXX. 
