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  *s 
  

  

  CONTENTS 
  OF 
  VOL 
  XLV. 
  

  

  (FIFTH 
  SEEIES). 
  

  

  NUMBEE 
  CCLXXII.— 
  JAKTJABY 
  1898. 
  

  

  Page 
  

   Prof. 
  H. 
  Nagaoka 
  on 
  Diffraction 
  Phenomena 
  in 
  the 
  Focal 
  

  

  Plane 
  of 
  a 
  Telescope 
  with 
  Circular 
  Aperture, 
  due 
  to 
  a 
  

  

  Finite 
  Source 
  of 
  Light 
  1 
  

  

  Mr. 
  W. 
  Sutherland 
  on 
  the 
  Belative 
  Motion 
  of 
  the 
  Earth 
  and 
  

  

  JEther 
  23 
  

  

  Mr. 
  C. 
  F. 
  Brush 
  on 
  the 
  Transmission 
  of 
  Eadiant 
  Heat 
  by 
  

  

  Gases 
  at 
  Varying 
  Pressures. 
  (Plates 
  I.-X.) 
  31 
  

  

  Mr. 
  W. 
  H. 
  Macaulay 
  on 
  the 
  Stresses 
  and 
  Deflection 
  of 
  

  

  Braced 
  Girders 
  42 
  

  

  Prof. 
  H. 
  A. 
  Eowland 
  on 
  Electrical 
  Measurement 
  by 
  Alter- 
  

   nating 
  Currents. 
  (Plate 
  XIX.) 
  66 
  

  

  Messrs. 
  A. 
  A. 
  Michelson 
  and 
  S. 
  VT. 
  Stratton 
  on 
  a 
  new 
  

  

  Harmonic 
  Analyser. 
  (Plates 
  XI.-XVIII.) 
  85 
  

  

  Prof. 
  AV. 
  Stroud 
  on 
  a 
  Telemetrical 
  Spherometer 
  and 
  Foco- 
  

  

  meter 
  91 
  

  

  Prof. 
  J. 
  Trowbridge 
  on 
  High 
  Electromotive 
  Force 
  98 
  

  

  Messrs. 
  J. 
  Trowbridge 
  and 
  J. 
  E. 
  Burbank 
  on 
  Phosphorescence 
  

  

  produced 
  by 
  Electrification 
  100 
  

  

  Mr. 
  J. 
  Eose-Innes 
  on 
  the 
  Isothermals 
  of 
  Ether 
  102 
  

  

  Mr. 
  J. 
  H. 
  Michell 
  on 
  the 
  Wave-Besistance 
  of 
  a 
  Ship 
  106 
  

  

  On 
  the 
  Conductivity 
  of 
  Carbon 
  for 
  Heat 
  and 
  Electricity, 
  by 
  

  

  L. 
  Cellier 
  124 
  

  

  The 
  Genesis 
  of 
  Dalton's 
  Atomic 
  Theory, 
  by 
  H. 
  Debus, 
  Ph.D., 
  

  

  F.E.S 
  124 
  

  

  