INDEX. 
699 
Iron, determination of the rigidity of, 363. 
I. 
J. 
Jones (T. W.). The Caudal Heart of the Eel a Lymphatic Heart, 675. 
K. 
Kurrachee, tides of, 685. 
L. 
Light, influence of motion on refraction of, 532 ; electromagnetic theory of, 652 (see Maxwell). 
Lymphatic heart of eel, 675 (see Jones). 
M. 
Macalister (A.) and Carte (A.), 201 (see Carte). 
Magnetic disturbances, comparison of, with those deduced from earth currents, 465 (see Airy). 
Magnetism, terrestrial, 371 (see Sabine). 
Magnetism in an iron ship, 487 (see Evans). 
Maxwell (J. C.). On the Influence of the Motions of the Heavenly Bodies on the Index of Refraction 
of Light, 532. 
On a Method of making a Direct Comparison of Electrostatic with Electromagnetic 
Force j with a Note on the Electromagnetic Theory of Light, 643. 
Merrifield (C. W.). On the Law of the Resistance of the Air to Rifled Projectiles, 443. 
Metals, wave-lengths corresponding to lines in the spectra of, 53. 
Moon, surface of the, 333 (see Phillips). 
N. 
Nebula of Orion, observations on the, 57 (see Oxmantown). 
Nebulce, spectra of, 540. 
Nitrites, action of, on blood, 589. 
Numbers, mysteries of, alluded to by Fermat, 627. 
0 . 
Orion, nebula of, 57 (see Oxmantown). 
Oxmantown (Lord). An Account of the Observations on the Great Nebula in Orion, made at Bin- 
Castle, with the 3-feet and 6-feet Telescopes, between 1848 and 1867. With a drawing of the 
Nebula, 57. 
MDCCCLXVIII. 
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