﻿848 



INDEX. 



Spectra, on the absorption, of organic 

 substances, 192 ; on radiation 

 from an electric source and line, 

 on, 709 ; of the alkali metals, on 

 the principal series in the, 775 ; 

 on the qnantum-theory of radia- 

 tion and line, 795. 



Spectral lines of zinc and titanium, 

 on displacements in, 394. 



series, on the magnetic field of 



an atom in relation to theories of, 

 40. 



Spectrum, on the series, of hydrogen, 

 140, 284, 332, 651 ; of palladium, 

 on the, 154 ; of mercury, on an 

 anomalous Zeeman effect in the, 

 241. 



lines, on the widening of, 274. 



Sphere, on the motion of a, in a 

 viscous fluid, 526. 



Sulphuric-acid drying-vessel, on a 

 new form of, 609. 



Supersaturation, on a theory of, 35. 



Surveyor's tape, on the correction 

 for rigidity for a, 96. 



Sutton (T. C.) on the van der Waals 

 formula and the latent heat of 

 vaporization, 593 ; on the photo- 

 electric constant and atomic heat, 

 734. 



Swain (Miss L.) on a tidal problem, 

 737. 



Takamine (T.) on an anomalous 

 Zeeman effect in satellites of the 

 violet line of mercury, 241. 



Tape, on the form of a suspended, 

 including the effect of stiffness, 96. 



Thermionic currents from tungsten, 

 on negative, 802. 



emission, on a qualitative 



method of investigating, 362. 



Thomas (D. E.) on a sensitive 

 method for examining optical 

 qualities of glass plates, 613. 



Thorium, on lead and the end pro- 

 duct of, 673. 



■ content of the earth's crust, on 



the average, 483. 



emanation, on the conden- 

 sation of, 337. 



Tidal problem, on a, 737. 

 Titanium, on displacements in 

 spectral lines of, 394. 



Topic parameters and morphotropic 



relationships, on, 745. 

 Triple-point, on the variation of the, 



with hydrostatic pressure, 143. 

 Tubes, on the collapse of, by external 



pressure, 67. 

 Tungsten, on negative thermionic 



currents from, 802. 

 Tunstall (N.) on the velocity of the 



alpha particles from radium A, 



259. 

 van der Waals formula, on the, 593. 

 Vaporization, on the latent heat of, 



593. 

 Varder (R. W.) on the absorption 



of homogeneous beta rays, 725. 

 Vegard (Dr. L.) on the series spec- 

 trum of hydrogen and the structure 



of the atom, 651. 

 Vibrations maintained by a periodic 



field of force, on, 15. 

 Vincent (Dr. J. H.) on the duplex 



harmonograph, 490. 

 Viscous fluid, on the equations of 



motion of a, 445 ; on the two- 

 dimensional steady motion of a, 



455 ; on the motion of a sphere in 



a, 526. 

 Walmsley (Lieut. H. P.) on the 



magnetic deflexion of the recoil 



stream from radium A, 253. 

 Watts (Dr. W. M.) on the principal 



series in the spectra of the alkali 



metals, 775. 

 Waves, on the mutual influence of 



resonators exposed to primary 



plane, 209. 

 Williams (W. E.) on the motion of 



a sphere in a viscous fluid, 526. 

 Wilson (Dr. W.) on the quantum- 

 theory of radiation and line 



spectra, 795. 

 Wilton (Dr. J. E.) on rippVs, 688. 

 Wire, on the form of a suspended, 



including the effect of stiffness, 96. 

 X-ray wave-lengths and absorption 



coefficients, on the relation between, 



407. 

 Young (A. E.) on the form of a 



suspended wire or tape including 



the effect of stiffness, 96. 

 Zinc, on displacements in spectral 



lines of, 394. 



END OF THE TWENTY-NINTH VOLUME. 



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