INDEX. 
777 
M. 
Magnetism, planetary influence on the earth’s, 379 (see Chambers). 
, terrestrial, 161 (see Sabine). 
Mallet (R.) . Addition to the paper “ On Volcanic Energy : an attempt to develop its true Origin and 
Cosmical Relations/ 5 205. 
Mollusca, developmental history of, 1 (see Lankester) . 
Myriothela, structure and development of, 549 (see Allman). 
N. 
Noble (Capt.) and Abel (F. A.). Researches on Explosives — Fired Gunpowder, 49 (for contents see 
p. 49). 
0 . 
Ophidia, structure and development of teeth in, 297. 
P. 
Periodical phenomena, disentanglement of simple, in observations of complex, 361 (see Chambers). 
Planets, influence of, on the earth’s magnetism, 379 (see Chambers). 
Potentials, a generalization of, 675 (see Cayley). 
Prepotentials, 675 (see Cayley). 
Prestwich (J.) . Tables of Temperatures of the Sea at different Depths below the Surface, reduced and 
collated from the various observations made between the years 1749 and 1868, discussed, 587 (for 
contents see p. 587) . 
R. 
Radiation, repulsion resulting from, 519 (see Crookes). 
Robinson (T. R.). Reduction of Anemograms taken at the Armagh Observatory in the years 1857-63, 
403. 
S. 
Sabine (Sir E.). Contributions to Terrestrial Magnetism. — No. XIV., 161. 
Sea-temperatures at different depths, 587 (see Prestwich). 
Seabroke (G. M.) and Lockyer (J. N.) (see Lockyer). 
Smallpox of sheep, 215 (see Klein). 
Spectrum, solar, as affected by terrestrial absorption, 157. 
Sprengel pump, improvements in, 519. 
Sun, spectroscopic observations of the, 577. 
