545 



INDEX to VOL. XVIII. 



AlR, on the velocity of sound in, 

 328. 



Alcohol radicals, on the magnetism 

 of some compounds of the, 78. 



Andreae (J. L.) on a lecture-experi- 

 ment illustrating Boyle's law, 80. 



Aniline salts, on the thermal relation 

 of some, to water, 105. 



Atmospheric absorption, on the 

 amount of the, 289. 



Ayrton (Prof. W. E.) on the gas- 

 engine indicator-diagram, 59. 



Becquerel (H.) on the infra-red 

 emission-spectra of metallic va- 

 pours, 386; on the wave-lengths 

 of the principal lines and bands in 

 the infra-red portion of the solar 

 spectrum, 465. 



Beetz (Prof. H. W.) on normal ele- 

 ments for electrometric measure- 

 ments, 173. 



Beryllium, on the atomic weight of, 

 21. 



Bifilar suspension, on the determina- 

 tion of the moments of inertia by 

 means of, 446. 



Bismuth, on a change in the physical 

 properties of, when placed in a 

 magnetic field, 389. 



Blaikley (D. J.) on the velocity of 

 sound in air, 328. 



Boiling-points, on the calculation of, 

 by the method of limits, 14. 



Books, new : — Glaser-De Cew's Mag- 

 neto-elektrischen und dynamo- 

 elektrischen Maschinen, and Ja- 

 ping's Elektrische Kraftiibertra- 

 gung, 77 ; Cheyne's Treatise on 

 the Planetary Theory, ib. ; Joule's 

 Scientific Papers, 153 ; Geology of 

 Wisconsin, 460 ; Smith's Conic 

 Sections, and Treatise on Solid 

 Geometry, 464 ; Williamson's Dif- 

 ferential Calculus, 465 ; Routh's 

 Dynamics of a System of Rigid 

 Bodies, 541. 



Bosanquet (R. H. M.) on permanent 

 magnets, 142 ; on the supposed 

 repulsion between magnetic lines 

 of force, 494. 



Phil. Mag. S. 5. Vol. 18. No. 115. Dec. 1884. 



Boyle's law, a lecture-experiment 

 illustrating, 80. 



Boys (C. V.) on a magneto-electric 

 phenomenon, 216. 



Buchheim (A.) on Sylvester's third 

 law of motion, 459. 



Callaway (Dr. C.) on the Archaean 

 and Lower Palaeozoic rocks of 

 Anglesey, 378. 



Campbell (Sir A.) on a speed-indi- 

 cator for ships' propellors, 57. 



Capillarity, on the phenomena of, 

 334. 



Carnelley (Prof. T.) on the periodic 

 law as illustrated by certain phy- 

 sical properties of inorganic com- 

 pounds, J. ; on the colour of che- 

 mical compounds as a function of 

 the atomic weights of their con- 

 stituent elements, 130; on the 

 periodic law, and the occurrence 

 of the elements in nature, 194. 



Chase (Prof. P. E.) on harmonic 

 motion in stellar systems, 200. 



Chemical compounds, on the colour 

 of, 130. 



saturation, observations on, 505. 



Climates, on the cause of mild polar, 

 268. 



Coal, on the structure and formation 

 of, 156. 



Colour of chemical compounds as a 

 function of the atomic weights of 

 their constituent elements, on the 

 130. 



Colour-combinations, on a new appa- 

 ratus for, 81. 



Condenser, on a method of measuring 

 the electrical capacity of a, 98. 



Contra variants, on, 374. 



Croll (Dr. J.) on the cause of mild 

 polar climates, 268. 



Cryohydrates, on, 22, 105. 



Crystallization, on strain in con- 

 nexion with, 157 ; on the water of, 

 179. 



Cuprite, on the hemihedrism of, 



127. 

 D'Auria (L.) on the ellipticity of 

 planets, 229. 



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