1090 
INDEX. 
D. 
Darwin (Gr. H.). On the Secular Changes in the Elements of the Orbit of a Satellite revolving about a 
Tidally distorted Planet, 718 (for contents see p. 713). 
De La Rue (W.) and Muller (H. W.). Experimental Researches on the Electric Discharge with the 
Chloride of Silver Battery, 65 (for index see p. 115). 
Double refraction in Iceland spar, 421 (see Glazebrook). 
Dynamo-electric current, on the, 1071 (see Siemens). 
E. 
Electric discharge, 65 (see De La Rue). 
Electric discharges in vacuum tubes, 561 (see Spottiswoode), 
Ellipsoids of revolution, conduction of heat in, 117. 
Ellis (W. E.). On the Relation between the Diurnal Range of Magnetic Declination and Horizontal 
Force, as observed at the Royal Observatory, Greenwich, during the Tears 1841 to 1877, and the 
Period of Solar Spot Frequency, 541. 
English reproduction table (see Farr). 
F. 
Farr (W.). English Reproduction Table, 281. 
Ferns in coal-measures, 505 (see Williamson). 
Fitzgerald (G. F.). On the Electromagnetic Theory of Light, 691. 
G. 
Gilbert (J. H.) and Lawes (J. B.) (see Lawes). 
Glazebrook (R. T.). Double Refraction and Dispersion in Iceland Spar, 421. 
Greenwich magnetic observations, conclusions from (see Ellis). 
Gunpowder, products of explosion of fired, 203 (see Noble). 
H. 
Heat, conduction of, in ellipsoids of revolution, 117. 
Hicks (W. M.). On the Motion of Two Spheres in a Fluid, 455. 
Huggins (W.). On the Photographic Spectra of Stars, 669; addendum, 688. 
Hydrogen, lines presumably of, in stars, 678. 
Hyposulphite of potassium, question of the formation of, in explosion of gunpowder, 209, 277. 
I. 
Images, application of method of, to motion of two spheres in a fluid, 455. 
