﻿IV CONTENTS OF VOL. XII. SIXTH SERIES. 



Page 



Dr. B. Schmid's Philosophisches Lesebuch 94 



G. Zahikjanz's Die Theorie, Berechnung und Konstruk- 



tion der Dampfturbineu 95 



Proceedings o£ the Geological Society : — 



The President's Anniversary Address. . . 95 



NUMBER LXVIIL— AUGUST. 



Lord Rayleigh on the Experimental Determination of the 



Ratio of the Electrical Units 97 



Dr. W. H. Eccles on the Effect of Electrical Oscillations on 



Iron in a Magnetic Eield 109 



Mr. J. S. Dow on Colour Phenomena in Photometry 120 



Prof. E. Rutherford on Retardation of the a particle from 



Radium in passing through Matter. (Plate II. fig. 3). . . . 134 

 Prof. R. W. Wood on Abnormal Polarization and Colour of 



Light scattered by Small Absorbing Particles 147 



Mr. P. Blackman on Atomic Conductivities of the Ions .... 150 

 Prof. E. Rutherford on the Distribution of the Intensity of 



the Radiation from Radioactive Sources. (Plate II.) .... 152 

 Prof. R. W. Wood on Eish-Eye Views, and Vision under 



Water. (Plate III.) 159 



Notices respecting- New Books : — 



Prof. R. W.^Wood's Physical Optics 162 



Prof. Carl Barus's The Nucleation of the Uncontaminated 



Atmosphere 164 



Prof. E. Guarini's Derniers Progres du Telpherage 



Electrique , 164 



Proceedings of the Geological Society : — 



Mr. R. D. Oldham on the Constitution of the Interior 



of the Earth, as revealed by Earthquakes 165 



Miss E. M.R. Wood on the Tarannon Series of Tarannon 166 

 Mr. G. M. Cockin on the Occurrence of Limestone of the 

 Lower Carboniferous Series in the Cannock-Chase 



Portion of the South-Staffordshire Coalfield 168 



Rev. E. Hill on the Chalk and Drift in Moen 168 



Prof. T. G. Bonney on the Relations of the Chalk and 



Boulder-Clay near Royston 169 



Prof. G. A. L. Lebour & Dr. J. A. Smythe on a Case 

 of Unconformity and Thrust in the Coal-Measures of 



Northumberland 170 



Messrs. H. J. O. White &L1. Treacher on the Phosphatic 



Chalks of Winterbourne and Boxford 171 



Prof. G. de Lorenzo on the Eruption of Vesuvius in April 



1906 173 



Mr. D. C. Evans on the Ordovician Rocks of Western 

 Caermarthenshire 174 



