[ 497 ] 



INDEX to VOL. XXVIII. 



ACHROMATIC interference- 



bands, on, 77, 189. 

 Air, on the change which the in- 

 ternal friction of, experiences at 

 different temperatures and under 

 various pressures, 220. 

 Anderson (Prof. R. J.) on an appa- 

 ratus illustrating crystal forms, 127. 

 Aromatic nucleus, on the constitu- 

 tion of the, 402, 443. 

 Arrhenius (Sv.) on electrolytic disso- 

 ciation versus hydration, 30 ; on the 

 influence of solar radiation on the 

 electrical phenomena in the atmo- 

 sphere of the earth, 75. 

 Aubel (E. van) on the electrical re- 

 sistance of bismuth, 332. 

 Availability, on endless, 185. 

 Biquartz, on the use of the, in deter- 

 mining the plane of polarization, 

 134. 

 Bismuth, on the electrical resistance 

 of, 332 ; on the phosphorescence 

 of, 428. 

 Books, new:— Croll's Stellar Evolu- 

 tion, 66 ; Ridsdale's Cosmic Evo- 

 lution, 67 ; Casey's Spherical Tri- 

 gonometry, 138 ; Smith's Graphics, 

 218; Grant Allen's Force and 

 Energy, 349; Watts's Dictionary 

 of Chemistry, Vol. II., 423; 

 Bernthsen's Text-book of Organic 

 Chemistry, 424; Warren's Ele- 

 mentary Treatise of Mechanics, 

 425. 

 Bottomley (J. T.) on the expansion 

 with rise of temperature of wires 

 under pulling stress, 94; on the 

 thermoelectric position of plati- 

 noid, 163. 

 Boys (C. V.) on quartz as an insu- 

 lator, 14. 



Burton (Dr. C. V.) on endless avail- 

 ability, 185; on a physical basis 

 for the theory of errors, 480. 



Callaway (C.) on the production of 

 secondary minerals in the crystal- 

 line rocks of the Malvern Hills, 67. 



Caoutchouc, on the molecular weight 

 of, 38. 



Carhart (H. S.) on an improved 

 standard Clark cell, 420. 



Carnot's principle, on a restriction to 

 the application of, 185. 



Champernowne (A.) on the volcanic 

 rocks near Totnes, 71. 



Clark cell, on the, as a source of 

 small constant currents, 353; on 

 the application of the, to the con- 

 struction of a standard galvano- 

 meter, 416; on an improved, with 

 low temperature-coefficient, 420. 



Clayden (A. W.) on some photo- 

 graphs of lightning and of "black" 

 electric sparks, 92. 



Clouds, on diffraction-colours with 

 special reference to iridescent, 272. 



Cole (G. A. J.) on the Northern 

 Slopes of Cader Idris, 69. 



Colloid bodies, on the molecular 

 weight of some, 38. 



Cooling, on the law of, 429. 



Copper, on the spectrum of, 74 ; on 

 the phosphorescence of, 428. 



Coronse, on diffraction-colours, with 



reference to, 272. 

 Crystal forms, on an apparatus illus- 

 trating, 127. 

 Currents, on the Clark cell as a source 



of small constant, 353. 

 Dale (Rev. T. P.) on a relation ex- 

 isting between the density and 

 refraction of gaseous elements and 

 of some of their compoimds, 268. 



