500 
INDEX. 
Dupre (A.). On the Specific Heat and other Physical Characters of Mixtures of Methylic Alcohol and 
Water, and on certain relations existing between the Specific Heat of a Mixture or Solution and the 
Heat evolved or absorbed in their formation, 331. — Specific heat, 331; heat produced by the mixing 
of methylic alcohol and water, 335 ; boiling-points, 336 ; capillary attraction, 337 ; specific gravity 
and rate of expansion, 338 ; compressibility, 340 ; comparison of experimental specific heats and 
heats of mixture with theoretical relation, 342. 
E. 
Evans (F. J.). On the present amount of Westerly Magnetic Declination [Variation of the Compass] 
on the Coast of Great Britain, and its Annual Changes, 319. 
F. 
Fossil corals, 29 (see Duncan) ; mammals, 41, 173, 241 (see Owen) ; plants of coal-measures, 197, 283 
(see Williamson). 
France, magnetic survey of, 7. 
G. 
Galeopithecus volitans, muscles of, 163. 
Gases, action of electricity on, 435 (see Brodie). 
Gibbs, wave-lengths of light published by Dr., discussed, 109. 
Guynia annulata, structure and affinities of, 29 (see Duncan). 
H. 
Heat, specific, of mixtures, 331 (see Dupre). 
K. 
Kirchhoff’s map of the spectrum, wave-lengths of the lines in, 89 (see Airy). 
L. 
Lepidodendra, 197. 
Lycopodiacece, fossil, 197, 283. 
M. 
Macalister (A.). The Myology of the Cheiroptera, 125. — Cutaneous muscles, 126 ; facial muscles, 130 ; 
muscles of the neck, 133; of the thorax, 134; of the back, 138; of the upper extremity, 141; 
of the abdomen, 152; comparison with other flying Mammals, 159; explanation of plates, 164. 
Madreporaria, persistence of palaeozoic types of, 36. 
Magnetic declination in Great Britain, 319 (see Evans.) 
Magnetic Survey of the East of France in 1869, 7. 
Magnetism, contributions to terrestrial, 353. 
Magnets, experiments on the directive powers of, 485 ; attraction of a galvanic coil on, 493 (see Airy). 
Mannite, hexane from, 118. 
Metals, wave-lengths of spectral lines of, 106. 
Mixtures, physical characters of, compared with those of their constituents, 331 (see Dupre). 
Muscles of Cheiroptera, 125 (see Macalister). 
