﻿PLATES. 
  

  

  I. 
  to 
  X. 
  Illustrative 
  of 
  Mr. 
  0. 
  F. 
  Brush's 
  Paper 
  ou 
  the 
  Transmission 
  of 
  

   Radiant 
  Heat 
  by 
  Gases 
  at 
  Varying- 
  Pressures. 
  

  

  XL 
  to 
  XVIII. 
  Illustrative 
  of 
  Messrs. 
  Michelson 
  and 
  Stratton's 
  Paper 
  on 
  

   a 
  New 
  Harmonic 
  Analyser. 
  

   XIX. 
  Illustrative 
  of 
  Prof. 
  H. 
  A. 
  Rowland's 
  Paper 
  on 
  Electrical 
  

   Measurement 
  "by 
  Alternating 
  Currents. 
  

  

  XX. 
  to 
  XXII. 
  Illustrative 
  of 
  Mr. 
  J. 
  H. 
  Vincent's 
  Paper 
  on 
  the 
  Photo- 
  

   graphy 
  of 
  Ripples. 
  

  

  XXIII. 
  Illustrative 
  of 
  Mr. 
  Thomas 
  Preston's 
  Paper 
  on 
  Radiation 
  

   Phenomena 
  in 
  the 
  Magnetic 
  Field. 
  

  

  XXIV.- 
  Illustrative 
  of 
  Mr. 
  R; 
  W. 
  Wood's 
  Paper 
  on 
  Phase-Reversal 
  

   Zone-Plates, 
  and 
  Diffraction-Telescopes. 
  

  

  ERRATA. 
  

  

  January 
  Number. 
  

   Prof. 
  Nagaoka's 
  paper 
  : 
  

  

  A 
  

  

  Page 
  10, 
  last 
  line, 
  for 
  — 
  read 
  - 
  . 
  

  

  Page 
  13, 
  line 
  4, 
  for 
  0-4832 
  read 
  0'4782. 
  

  

  Page 
  15, 
  line 
  12, 
  for 
  (l+2/i+2ft 
  4 
  . 
  . 
  .) 
  read 
  (l+2h+2h*. 
  . 
  .) 
  2 
  . 
  

  

  E 
  /E 
  \ 
  

  

  Page 
  16, 
  line 
  1, 
  for 
  ^, 
  +K 
  read 
  | 
  \^ 
  +KJ. 
  

  

  Page 
  16, 
  line 
  9, 
  for 
  2-0113 
  read 
  2-0613. 
  

  

  Mr. 
  J. 
  H. 
  Michell's 
  paper 
  : 
  

  

  The 
  twelve 
  lines 
  at 
  the 
  bottom 
  of 
  page 
  111 
  should 
  come 
  after 
  

   line 
  7 
  on 
  p. 
  108. 
  

  

  February 
  Number. 
  

   Page 
  156, 
  as 
  heading 
  of 
  3rd 
  column 
  of 
  Table. 
  For 
  £K 
  2 
  S0 
  4 
  read 
  £K 
  2 
  S0 
  4 
  . 
  

  

  