VI CONTENTS OF VOL. XLII. — FOURTH SERIES. 



Page 

 Proceedings of the Geological Society : — 



Sir P. G. Egertori on a New Chimseroid Fish from the Lias 



of Lyme Regis 315 



Mr. A. Geikie on the Tertiary Volcanic Rocks of the British 



Islands 315 



The Rev. T. G. Bonney on the formation of ' Cirques' . . 317 



On the Spectra of Sulphur, by M. G. Salet \ . . . 318 



On some Luminous Tubes with Exterior Electrodes, by M. 



Alvergniat , 319 



On the Amount of Time necessary for Vision, by Ogden N.Rood, 

 Professor of Physics in Columbia College 320 



NUMBER CCLXXXL— NOVEMBER. 



Prof. R. Clausius on the Application of a Mechanical Equation 

 advanced by him to the Motion of a Material Point round a 

 fixed Centre of Attraction, and of two Material Points about 



each other t ■ 321 



Mr. W. Mathews on Canon Moseley's views upon Glacier- 

 motion 332 



Messrs. J. E. H. Gordon and W. Newall on the Effect of small 



Variations of Temperature on Steel Magnets 335 



Dr. H. Hudson on the Theory of Exchanges 341 



Prof. Ch. V. Zenger on a New Steam-gauge 344 



Canon Moseley on the steady Flow of a Liquid 349 



Sir W. Thomson on Hydrokinetic Solutions and Observations. 362 

 Parts I. & II. On the Motion of Free Solids through a 



Liquid 362 



Parts III. & IV. The Influence of Wind on Waves in 



water supposed frictionless , 368 



Part V. Waves under motive power of Gravity and Cohe- 

 sion jointly, without wind 374 



Prof. C. A. Young's Preliminary Catalogue of the Bright Lines 



in the Spectrum of the Chromosphere 377 



Notices respecting New Books : — 



The Rev. A. Hiley's Explanatory Mensuration for the use 



of Schools 381 



Proceedings of the Royal Society : — 



Messrs. H. E. Roscoe and T. E. Thorpe on the Measure- 

 ment of the Chemical Intensity of Total Daylight made 

 at Cataniaduring the Total Eclipse of December 22, 1870. 382 

 Proceedings of the Geological Society : — 



Prof. P. M. Duncan on a new species of Coral from the 



Red Crag of Waldringfield 385 



Mr. R. H. Scott on the Minerals of Strontian, Argyllshire. 385 

 Mr. T. W. Kingsmill on the probable origin of Deposits of 

 " Loess " in North China and Eastern Asia 386 



