INDEX. 
607 
M. 
Machine, logical, 497 (see Jevons). 
Macrauchenia patachonica, 79 (see Owen). 
Magnetic disturbances, comparison of, with earth-currents, 215 (see Airy, G. B.). 
Magnetic elements, secular changes of, in west of France, 46 ; values of, in ditto for Jan. 1, 1869, 48 ; 
observations of, at Loyola, 50. 
Magnetic Survey of the British Islands, 265 (see Sabine) ; of the West of France, 33 (see Perry). 
Manegaum meteorite of 1843, 211. 
Maskelyne (N. S.). On the Mineral Constituents of Meteorites, 189. 
Meteorites, mineral constituents of, 189. 
Mexico, remains of an extinct Lama found in the Valley of, 65 (see Owen). 
Microscope, application of, to the investigation of meteorites, 189. 
, improvements in the, 591. 
Muscles of the human neck, fyc., varieties and homologies of, 83 (see Wood). 
0 . 
Oldliamite, 195. 
Osbornite, 198. 
Owen (R.). On Remains of a large extinct Lama [Palauchenia magna, Ow.), from Quaternary Deposits 
in the Valley of Mexico, 65. 
On the Molar Teeth, Lower Jaw, of Macrauchenia patachonica, Ow., 79. 
On the Fossil Mammals of Australia. — Part III. Diprotodon australis, Ow., 519. 
P. 
Palauchenia magna, description of, 65 (see Owen). 
Perry (S. J.). Magnetic Survey of the West of France, 1858, 33. 
Pigott (G. W. R.). On a Searcher for Aplanatic Images applied to Microscopes, and its effects in 
increasing Power and improving Definition, 591. 
Planets, possible influence of configuration of, on solar disturbance, 396. 
Poinsot’s representation of the motion of a rotating body, 1 (see Ferrers). 
R. 
Rankine (W. J. M.). On the Thermodynamic Theory of Waves of Finite Longitudinal Disturbance, 
277. Supplement, 287. 
Refraction-equivalents of the elements, 9. 
Refractive indices of various substances and solutions, table of, 28. 
Roscoe (H. E.). Researches on Vanadium. — Part III. 317. — Metallic vanadium, 317 ; vanadium and 
bromine, 318; vanadium and iodine, 321 ; metallic vanadates, 321. 
and Thorpe (T. E.). On the Relation between the Sun’s Altitude and the Chemical Intensity 
of Total Daylight in a Cloudless Sky, 309. 
Rotation of a rigid body about a fixed point, 1. 
