485 



INDEX to VOL. XLIX. 



ABSORPTION phenomena, on a 

 new class of, 323. 



Acoustics, researches in, 352, 428. 



Allport (S.) on the microscopic struc- 

 ture and composition of British 

 carboniferous dolerites, 479. 



Aniline derivatives, on, 21. 



Attfield (Dr.) on the spectrum of car- 

 bon, 106. 



Audition, on new facts in the phvsio- 

 logy of, 360. 



Aurora, on the spectrum of the, 65, 

 249, 410, 481. 



Belt (T.) on the geology of the 

 Steppes of Siberia, 479. 



Benoit (R.) on the electrical resist- 

 ance of metals, 78. 



Bezold (W. von) on the mixture of 

 colours in binocular vision, 78. 



Blondlot (R.) on the determination 

 of the quantity of magnetism in a 

 magnet, 482. 



Bottger (R.) on the conservation and 

 properties of a plate of palladium 

 saturated with hydrogen by elec- 

 trolysis, 80. 



Books, new : — Spottiswoode's Polari- 

 zation of Light, 72 ; Ruchonnet's 

 Exposition geometrique des Pro- 

 prietes generates des Courbes, 225 ; 

 Ruchonnet's Elements de Calcul 

 approximatif, 227; Williamson's 

 Integral Calculus, 319 ; Jevons's 

 Principles of Science, 400 ; Wein- 

 hold's Introduction to Experimen- 

 tal Physics, 404. 



Boron, on the specific heat of, 161, 

 290. 



Bosanquet (R. H. M.) on the mathe- 

 matical theory of Hamilton's string 

 organ, 98. 



Bouty's (Prof. E.) studies on mag- 

 netism, 81, 186 ; on the magneti- 

 zing-function of tempered steel, 

 320. 



Broun (J. A.) on the sun-spot period 

 and the rainfall, 474. 



Camacho (J.) on a new electromag- 

 net, 244. 



Capron (J. R.) on the comparison of 

 some tube and other spectra with 

 the spectrum of the aurora, 240, 

 481. 



Carbon, in the modern spectroscope, 

 on, 24, 104, 106 ; on the specific 

 heat of, 161, 175, 276. 



Cockle (Sir J.) on primary forms, 

 134. 



Colour, on combination of, by means 

 of polarized light, 146. 



Coniferine, researches on, 229. 



Cryohydrates, on the, 1 1, 206, 266. 



Culley (R. S.) on Camacho's new 

 electromagnet, 332. 



Curtis (Prof. A. H.) on extraordinary 

 reflection, 366. 



Diamagnetism, on the experimental 

 determination of, by its electrical 

 inductive action, 246. 



Diamond, on the specific heat of, 



175. 



Diffraction, on the projection of the 

 Fraunhofer lines of, on a screen, 

 142. 



Dolerites, on the microscopic struc- 

 ture and composition of Britisli 

 carboniferous, 479. 



Draper (Prof. J. C.) on the projec- 

 tion of the Fraunhofer lines of dif- 

 fraction and prismatic spectra on a 

 screen, 142. 



Electric conducting-power of the 



