VI CONTENTS OF VOL. XXXIX. FIFTH SERIES. 



NUMBEE CCXLL— JUNE. 



Page 



Prof. A. Schuster on the Scale- Value of the late Dr. Joule's 



Thermometers. (Plates V. & VJ.) 477 



Dr. Ladislas Natanson on the Kinetic Energy of the Motion 



of Heat and the corresponding Dissipation Function .... 501 

 Mr. Spencer Umfreville Pickering on the Heat of Combination 



of Substances in the Liquid and Solid Condition 510 



Dr. F. Eicharz on Helmholtz's Electrochemical Theory, and 



some Conclusions deduced from the same 529 



Mr. G. H. Bryan on a Simple Graphic Illustration of the 



Determinantal Belation of Dynamics 531 



Prof. Silvanus P. Thompson on a Neglected Experiment of 



Ampere 534 



Proceedings of the Geological Society : — 



Mr. John H. Cooke on the Pleistocene Beds of the 



. Maltese Islands 542 



Rev. E. Baron's Geological Notes of a Journey in Mada- 

 gascar 542 



Mr. E. Bullen Newton on a Collection of Fossils from 



Madagascar obtained by the Eev. E. Baron 543 



Prof. T. G. Bonney's Supplementary Note on the Nar- 



borough district (Leicestershire) 543 



Mr. J. E. Marr on the Tarns of Lakeland 544 



Mr. J. Bridges Lee's Description of a New Instrument 

 for Surveying by the Aid of Photography, with some 

 Observations upon the Applicability of the Instrument 



to Geological Purposes 544 



Mr. David Draper on the Marble Beds of Natal 545 



Mr. Thomas Leighton on the Lower Greensand above 



the Atherfield Clay of East Surrey 546 



Mr. W. S. Gresley on the Eastern- Limits of the York- 

 shire and Derbyshire or Midland Coalfield 547 



Mr. W. S. Gresley on some Phases of the Structure and 

 Peculiarities of the Iron Ores of the Lake Superior 



Eegion 547 



On Electromagnetic Tractive Force, by M. Weber 547 



On the Influence of Magnetization on the Constants of Elas- 

 ticity in Iron, by A. Bock 548 



On the Magnetization of Iron by very small Forces, by 

 Werner Schmidt 548 



Index '. 549 



