IV CONTENTS OF VOL. XXXYI. SIXTH SERIES. 



Notices respecting New Books : — 



J. Duncan and S. G. Starling's A Text Book of 



Physics 142 



J. W. Trench's translation of Steinheil and Voit's Applied 



Optics : The Computation of Optical Systems 142 



Intelligence and Miscellaneous Articles : — 



Augle Trisection, by H. E. Kempe 143 



NUMBEE COXIL— AUGUST. 



Prof. E. Taylor Jones on the Potential generated in a High- 

 tension Magneto. (Plate VII.) '. 145 



Prof. Barton and Miss Browning on Forced Vibrations Ex- 

 perimentally Illustrated. (Plates VIII. & IX.) 169 



Dr. Harold Jeffreys on Problems of Denudation 179 



Mr. E. Hargreaves on a Diffraction Problem, and an Asym- 

 ptotic Theorem in Bessel's Series 191 



Messrs. M. N. Shaha and S. N. Basu on the Influence of the 

 Finite Volume of Molecules on the Equation of State .... 199 



Dr. Harold Jeffreys on the Secular Perturbations of the Inner 

 Planets 203 



Prof. A. D. Fokker on Eelativity and Electrodynamics .... 205 



Proceedings of the Geological Society : — - 



The President's Anniversary Address , . 206 



Prof. W. M. Davis on the Geological Aspects of the 

 Coral-Eeef Problem 207 



NUMBEE CCXIII.— SEPTEMBEE. 



Mr. G. A. Hemsalech : A Comparative Study of the Flame 



and Furnace Spectra of Iron. (Plate X.) 209 



Lord Eayleigh on the Theory of the Double Eesonator .... 231 

 Dr. J. E. Airey on the Addition Theorem of the Bessel 

 Functions of Zero and Unit Orders 234 



