VI CONTENTS OF VOL. X. FIFTH SERIES. 



Page 

 Messrs. Ghithrie and Bovs 011 Magneto-Electric Induction. 



Part II.— Conduct ivity of Liquids. (Plate VIII.) .... 328 

 Mr. S. Tolver Preston on one of the Physical Premises upon 



which the Finality of Universal Change is based 338 



Dr. T. Craig on Steady Motion in an Incompressible Viscous 



Fluid 342 



Prof. E. Wiedemann on the Thermic and Optical Behaviour 

 of G-ases under the Influence of the Electric Discharge. 



(Plate IX.) 357 



Mr. D. Winstanley on Air-Thermometers. (Plate VII.) 380 



Notices respecting New Books : — ■ 



Catalogue of Books and Papers relating to Electricity, 

 Magnetism, the Electric Telegraph, &c, including the 

 Ronalds Library. Compiled by Sir Francis Ronalds, 



F.R.S. ; 383 



On the Law of Electromagnetic Machines, by J. Joubert. . . . 384 

 On the Absolute Measure of Peltiers Phenomenon at the 



Contact of a Metal and its Solution, by E. Bouty 386 



Results of Pendulum Experiments, by C. S. Peirce, Assistant 



U.S. Coast and Geodetic Survey 387 



On the Illumination of Electrodes, by R. Colley 387 



Photographs of the Nebula in Orion, bv Prof. Henry Draper, 

 M.D 388 



NUMBER LXIV.— DECEMBER. 



Dr. A. Macfarlane on the Disruptive Discharge of Electricity. 



(Plate XI.) .......'. 389 



Prof. E. Wiedemann on the Thermic and Optical Behaviour 



of Gases under the Influence of the Electric Discharge. . . . 407 

 Mr. "W. H. Preece on the Space protected by a Lightning-Con- 



ductor. (Plate X.) 427 



Mr. J. Hopkinson on Mr. E. H. Hall's Experiments on the 



" Action of Magnetism on a permanent Electric Current." . . 430 

 Mr. R. Shida on the Number of Electrostatic Units in the 



Electromagnetic Unit 431 



Mr. L. B. Fletcher on the Relation between the Mechanical 



Equivalent of Heat and the Ohm 436 



Mr. W. R. Browne on Action at a Distance 437 



Notices respecting New Books : — 



Mr. R. L. Jack's Reports on the Geology of Queensland. 445 

 Proceedings of the Geological Society : — 



Prof. T. G. Bonney on the Serpentine and Associated 



Rocks of Anglesey 447 



Mr. C. Moore on Abnormal Geological Deposits in the 

 Bristol District . . . , . . 447 



