984 
INDEX. 
geographical, bathymetrical, and geological distribution, 558; relation to other Orbitoline types, 
559; evolutionary history of the Orbitoline type, 567; theory of descent, 569; explanation of 
jilates, 571. 
Coal-Measures, fossil plants of, 459 (see Williamson). 
Compass, change in the deviations of, on a change of magnetic latitude, 615. 
Creak (E. W.). On the Changes which take place in the Deviations of the Standard Compass in the 
Iron Armour-plated, Iron, and Composite-built Ships of the Royal Navy, on a considerable change 
of Magnetic Latitude, 615.—General conclusions, 625. 
Crinoid, new, from the Southern Sea, 919. 
Critical velocity, separating direct from sinuous motion in liquids (see Reynolds). 
Crookes (W.). The Bakerian Lecture. —On Radiant Matter Spectroscopy—the Detection and wide 
Distribution of Yttrium, 891. 
Croonian Lecture (see Martin). 
D. 
Dadoxylon, 469. 
Darcy’s experiments discussed, 977. 
De La Rue (W.) and Muller (H. W.). Experimental Researches on the Electric Discharge with the 
Chloride of Silver Battery.—Part IY. Tube potential, 477 (for index see p. 516). 
Descent, theory of, 569. 
Dewar (J.) and Liyeing (G. D.), 187 (see Liveing). 
Dodds (J. M.) and Glazebrook (R. T.), 223 (see Glazebrook). 
E. 
Eddies, circumstances determining the formation of (see Reynolds). 
Elasticity (see Tomlinson). 
Electric discharge in rarefied ga<es, 477 (see De La Rue). 
Electrical motions in a spherical conductor, 519. 
Electrical resistance, 173, 223, 252, 295 (see Rayleigh and Glazebrook). 
Electricity, comparison of the electrostatic and electrodynamic units of, 707. 
E. 
Foraminifera, 551 (see Carpenter). 
Forsyth (A. R.). On Abel’s Theorem and Abelian Functions, 323.—Contents of the paper described, 
323; Section I., 324; Section II., Abelian functions after Weierstrass, 347. 
Fossil plants of the Coal-Measures, 459 (see Williamson). 
G. 
Gardiner (W.). On the Continuity of the Protoplasm through the Walls of Vegetable Cells, 81/. Pit 
membrane, nature of, 827; pulvini, structure of, 830; additional note, 858; description of plates, 859. 
Gilbert (J. H.) and Lawes (Sir J. B.) (see Lawes). 
