﻿CONTENTS 
  OF 
  VOL. 
  XVI. 
  SIXTH 
  SERIES. 
  V 
  

  

  Page 
  

  

  Br. 
  S. 
  E. 
  Milner 
  on 
  Interference 
  Fringes 
  obtained 
  with 
  

   Glass 
  Wedges, 
  and 
  their 
  Application 
  to 
  the 
  Examination 
  

  

  of 
  Plate 
  Glass 
  . 
  429 
  

  

  Mr. 
  B. 
  Iiargreaves 
  : 
  A 
  Pressure-integral 
  as 
  Kinetic 
  Potential. 
  436 
  

   Lord 
  Bayleigh 
  on 
  Befiexion 
  from 
  Glass 
  at 
  the 
  Polarizing 
  

  

  Angle 
  ' 
  444 
  

  

  Mr. 
  P. 
  E. 
  Smith 
  on 
  the 
  Variation 
  of 
  Manganin 
  Besistances 
  

  

  with 
  Atmospheric 
  Humidity 
  450 
  

  

  Dr. 
  J. 
  E. 
  Aluny 
  on 
  Minimum 
  Spark 
  Potentials 
  456 
  

  

  Mr. 
  E. 
  W. 
  Very 
  on 
  the 
  Greenhouse 
  Theory 
  and 
  Planetary 
  

  

  Temperatures 
  , 
  , 
  . 
  462 
  

  

  Mr. 
  B. 
  S. 
  Cohen 
  on 
  the 
  Production 
  of 
  Small 
  Variable 
  Fre- 
  

   quency 
  Alternating 
  Currents 
  suitable 
  for 
  Telephonic 
  and 
  

  

  other 
  Measurements. 
  (Plates 
  XVI.-XIX.) 
  . 
  .- 
  480 
  

  

  Notices 
  respecting 
  New 
  Books 
  : 
  — 
  

  

  The 
  Collected 
  Mathematical 
  Papers 
  of 
  J. 
  J. 
  Sylvester, 
  

  

  and 
  (Euvres 
  de 
  Charles 
  Heriuite 
  492 
  

  

  J. 
  H. 
  Jeans'" 
  Elementary 
  Treatise 
  on 
  Theoretical 
  

  

  Mechanics 
  493 
  

  

  Proceedings 
  of 
  the 
  Geological 
  Society 
  : 
  — 
  

  

  Drs. 
  C. 
  A. 
  Matleyaud 
  A 
  Vaughan 
  on 
  the 
  Carboniferous 
  

  

  Bocks 
  at 
  Loughshinny 
  (County 
  Dublin) 
  . 
  . 
  . 
  „ 
  494 
  

  

  Mr. 
  J. 
  Parkinson 
  on 
  the 
  Petrology 
  and 
  Physiography 
  of 
  

  

  "Western 
  Liberia 
  (West 
  Coast 
  of 
  Africa) 
  495 
  

  

  Mr. 
  J. 
  E. 
  N. 
  Green 
  on 
  the 
  Geological 
  Structure 
  of 
  the 
  

   St. 
  David's 
  Area 
  (Pembrokeshire) 
  496 
  

  

  NUMBEE 
  XCIV.— 
  OCTOBEB. 
  

  

  Mr. 
  W. 
  Sutherland 
  : 
  Another 
  Method 
  of 
  Measuring 
  large 
  

   Molecular 
  Masses 
  497 
  

  

  Mr. 
  E. 
  Soddy 
  : 
  Attempts 
  to 
  detect 
  the 
  Production 
  of 
  Helium 
  

   from 
  the 
  Primary 
  Badio-Elements. 
  (Plate 
  XX.) 
  513 
  

  

  Prof. 
  D. 
  N. 
  Malllk 
  on 
  Magnetic 
  Eotation 
  of 
  Electric 
  Dis- 
  

   charge. 
  (Plate 
  XXL) 
  531 
  

  

  Dr. 
  C. 
  G. 
  Barkla 
  and 
  Mr. 
  C. 
  A. 
  Sadler 
  on 
  Homogeneous 
  

   Secondary 
  Eontgen 
  Eadiatious 
  550 
  

  

  Mr. 
  J. 
  Satterly 
  on 
  the 
  Amount 
  of 
  Eadium 
  Emanation 
  in 
  the 
  

   Atmosphere 
  584 
  

  

  Mr. 
  A. 
  Stephenson 
  on 
  Periodic 
  Nongenerating 
  Forces 
  of 
  

   High 
  Frequency 
  616 
  

  

  Prof. 
  A. 
  S. 
  Eve 
  on 
  the 
  Amount 
  of 
  Eadium 
  Emanation 
  in 
  the 
  

   Atmosphere 
  near 
  the 
  Earth's 
  Surface 
  622 
  

  

  Mr. 
  F. 
  Soddy 
  on 
  the 
  Relation, 
  between 
  Uranium 
  and 
  Eadium. 
  

   Ill 
  , 
  632 
  

  

  Messrs. 
  E. 
  Bellini 
  and 
  A. 
  Tosi 
  on 
  a 
  Directive 
  Svstem 
  of 
  

   Wireless 
  Telegraphy 
  638 
  

  

  