CONTENTS OF VOL. XXIX. FOURTH SERIES. Vll 



Page 



Lieutenant Warren on the Caves of Gibraltar 403 



Dr. H. Falconer on the asserted occurrence of Human Bones 



in the ancient deposits of the Nile and the Ganges. . . . 403 

 The Rev. J. E. T.Woods on some Tertiary Deposits in the 



Colony of Victoria, Australia 404 



Mr. W. Whitaker on the Chalk of the Isle of Thanet 404 



Mr. W. Whitaker on the Chalk of Buckinghamshire, and 



on the Chalk of the Isle of Wight 405 



On a New Thermo-Element, by M. S. Marcus 406 



On Production of Magnetism by Turning, by C. B. Greiss . . 407 



On the Alteration of Electromotive Force by Heat, by F. Lindig. 408 



NUMBER CXCVIIL— JUNE. 



Mr. F. Jenkin on the Retardation of Electrical Signals on Land 



Lines. (With a Plate.) 409 



Dr. Rankine on Rational Approximations to the Circle .... 421 

 Sir David Brewster on the Cause and Cure of Cataract ...... 426 



Mr. J. H. Cotterill on the Principle of Least Action 430 



Prof. Maxwell and Mr. F. Jenkin on the Elementary Relations 



between Electrical Measurements 436 



Prof. Cay ley on a Theorem relating to Five Points in a Plane. 460 



Prof. A. W. Williamson on Chemical Nomenclature 464 



M.Feussner on the Absorption of Light at different Temperatures. 471 

 Proceedings of the Royal Society : — 



Prof. Maskelyne on New Cornish Minerals of the Brochan- 



tite Group 473 



Mr. B. Stewart and Prof. Tait on the Radiation from a 



Revolving Disk 476 



Mr. F. Jenkin on the New Unit of Electrical Resistance 

 proposed and issued by the Committee on Electrical 

 Standards appointed in 1861 by the British Association. 477 

 On an Air-pump constructed on a new Principle, by M. Deleuil. 487 



On a Meteor and Meteorites of Orgueil 487 



On a Phenomenon in the Induction-Spark, by E. Fernet .... 488 



NUMBER CXCIX.— SUPPLEMENT. 



o 



M. A. J. Angstrom on a new Determination of the Lengths of 

 Waves of Light, and on a Method of determining, by Optics, 

 the Translatory Motion of the Solar System. (With a Plate.) 489 

 Prof. Cayley on the Intersections of a Pencil of four Lines by a 



Pencil of two Lines 501 



Sir David Brewster on Hemiopsy, or Half- Vision 503 



Prof. Maxwell and Mr. F. Jenkin on the Elementary Relations 



between Electrical Measurements 507 



Mr. J. C. Moore on Lake-Basins 526 



Dr. Atkinson's Chemical Notices from Foreign Journals 528 



