CONTENTS OF VOL. XI. FIFTH SERIES. V 



Page 



On some Experiments Instituted to Supply all the Lines ter- 

 minating at the Calcutta Telegraph-Office with Currents 

 tapped from the Main Current produced by a Dynamo- 

 electric Machine, by Louis Schwendler, Esq.,' M.I.C.E. &c. 221 



Determination of the Colours corresponding to the Fundamental 

 Sensations by means of Botating Disks, by M. A. Bosen- 

 stiehl . 222 



On the Liberation of Electricity in Tourmaline by Pressure, 

 by MM. Jacques and Pierre Curie 224 



Confirmation of the Nebular Hypothesis, by Pliny Earle Chase, 

 LL.D 226 



On the Choice of the Unit of Force in Absolute Electric 

 Measurements, by M. Lippmann 226 



NTJMBEB LXYIIL— APEIL. 



Mr. J. J. Thomson on the Electric and Magnetic Effects pro- 

 duced by the Motion of Electrified Bodies 229 



Prof. Challis's Theoretical Explanations of the Bectilinear 

 Transmission and Spontaneous Diffusion of Sound and Light 249 



Mr. H. A. Eowland on the new Theory of Magnetic Attrac- 

 tions, and the Magnetic Eotation of Polarized Light 254 



Dr. C. E. A. Wright on the Determination of Chemical Affinity 

 in terms of Electromotive Porce.— Part IV. (Plate III.)/. 261 



Prof. H. Hennessy on the Figures of the Planets 283 



Prof. S. P. Thompson on the Construction of the Photophone 286 



Mr. E. T. Grlazebrook on the Measurement of Small Eesist- 

 ances 291 



Messrs. Eoberts and Wrightson on the Determination of the 

 Density of Fluid Bismuth by means of the Oncosimeter . . 295 



Captain Abney on Lines in the Infra-red Eegion of the Solar 

 Spectrum 300 



Mr. S. Bidwell on the Effect of Temperature upon the Elec- 

 trical Eesistance of Selenium 302 



Notices respecting New Books : — 



Mr. B.Williamson's Elementary Treatise on the Integral 

 Calculus, containing Applications to Plane Curves and 

 Surfaces, with numerous examples 303 



On Steady Motion in an Incompressible Viscous Fluid, by 

 Thomas Craig 304 



Determination of the Fundamental Colour-Sensations by the 

 Study of the Distribution of the Complementary Colours in 

 the Chromatic Circle. (Second Note.) By M. A.'Bosenstiehl 305 



On Tones produced by the Intermittent Irradiation of a Gas, 

 by Prof. W. C. Eontgen 308 



Eesearches on the Specific Magnetism of Ozone, by M. Henri 

 Becquerel 311 



