986 
INDEX. 
P. 
Palladium, Volatile alloy of, with hydrogen, 482 (see De La Rue). 
Paraffins, on the normal, 269. 
Parker (W. K.) On the Skeleton of the Marsipobranch Pishes.— Parti. The Myxinoids (Myxine and 
Bdellostoma), 373.—Hag Fish (Myxine glutinosa), 376; Bdellostoma, 394; summary and conclnsion 
of Part I., 403 ; description of the plates, 407. Part II. Petromyzon, 411; embryo of Petromyzon, 
439; summary and conclnsion, 450; description of the plates, 454. 
Pitch, determination of the, of a standard tuning-fork, 316. 
Protoplasm, continuity of, through the walls of vegetable cells, 817 (see Gardiner). 
Psaronius, 464 (see Williamson). 
Pulvini, structure of, 830. 
R. 
Rayleigh (Lord) and Sidgwice (Mrs. H.). Experiments, by the Method of Lorentz, for the further 
Determination of the Absolute Value of the British Association Unit of Resistance, with an 
Appendix on the Determination of the pitch of a Standard Tuning-Fork, 295.—Appendix, 316; 
second appendix, effect of imperfect insulation of coils, 321. 
Rayleigh (Lord) and Sidgwice (Mrs. H.). On the Specific Resistance of Mercury, 173. 
Reinold (A. W.) and Rucker (A. W.). The Limiting Thickness of Liquid Films, 645; electrical 
experiments, 646 ; optical experiments, 652 ; summary of results, 660. 
Renilla, development of, 723 (see Wilson). 
Resistance, electrical, of mercury, 173 (see Rayleigh); value of the British Association unit of, 223, 295 
(see Glazebrook and Rayleigh). 
Reynolds (O.). An Experimental Investigation of the Circumstances which Determine whether the 
Motion of Water shall be Direct or Sinuous, and of the Law of Resistance in Parallel Channels, 
935.—Section I., introductory, 935 ; Section II., experiments in glass tubes by means of colour 
bands, 949; Section III., experiments to determine the - critical velocity by means of resistance in 
the pipes, 957 ; Section IV., application to Darcy’s Experiments, 977. 
Rucker (A. W.) and Reinold (A. W.) (see Reinold). 
S. 
Sargant (E. B.) and Glazebrook (R. T.), 252 (see Glazebrook). 
Sciiorlemmer (C.) and Thorpe (T. E.). On the Normal Paraffins.—Part IV., 269. 
Sidgwice (Mrs. H.) and Rayleigh (Lord) (see Rayleigh). 
Socotra, on a collection of rock specimens from, 273. 
Spectra, ultra-violet, of the elements, 187 (see Liveing). 
Spectroscopy by radiant matter, 891 (see Crookes). 
Sporocarpon, 469 (see Williamson). 
Stewart and Schuster, discussion of experiments of, on the electrical resistance of copper by magneti 
zation, 157. 
Stress and strain, effect of, on the action of physical forces, 1 (see Tomlinson). 
