CONTENTS OF VOL. XVII. FIFTH SERIES. Vll 



Page 

 Mrs. S. Bryant on the Failure of the Attempt to deduce Induc- 

 tive Principles from the Mathematical Theory of Proba- 

 bilities 510 



Prof. R. Clausius on the Theory of the Transmission of Power 



by Dynamo-electrical Machines 518 



Mr. R. H. M. Bosanquet on Electromagnets. — No. 1 531 



Mr. W. W. J. Nicol on the Saturation of Salt-Solutions 537 



Notices respecting New Books : — 



Capt. C. Dutton's Tertiary History of the Grand-Canon 



District 551 



Proceedings of the Geological Society : — 



Mr. T. M. Reade on a Delta in Miniature 557 



Prof. J. W. Judd on the Nature and Eelations of the 



Jurassic Deposits which underlie London 557 



Observations on Earth Currents in Lines a Kilometre in length, 

 and their Comparisons with Magnetic Variations, by H, 



Wild 559 



On the Absolute Standard of Light, by Prof. J. Violle 563 



Index 565 



ERRATA. 



Page 5, line 7, for r sin 6 d6 read r sin 6 dcf> 

 line 14, „ „ „ „ 



last line, for l-j read ( - V 



— 6, lines 16, 17, „ „ „ 



— 11, line 3, for greater read quarter 



— 66, equation (3 a), for n *~l read r hzl 



— 67, equation (3 b), for n *~ 1 read n * 1 



(T (T l 



— 67, equation (3 c), 



n 2 — 1 o- n x 2 -2 o"! n 2 +2 ' <r » x 2 + 2 " cr x 



