﻿378 
  On 
  Attraction 
  and 
  Repulsion 
  from 
  Radiation. 
  [Apr. 
  29, 
  

  

  were 
  shown 
  with 
  them. 
  The 
  following 
  Table, 
  which 
  gives 
  the 
  result 
  o£ 
  

   some 
  experiments 
  tried 
  with 
  one 
  of 
  the 
  first-made 
  radiometers 
  (and 
  there- 
  

   fore 
  not 
  so 
  sensitive 
  as 
  more 
  recent 
  instruments), 
  is 
  copied 
  from 
  a 
  card 
  

   which 
  was 
  distributed 
  during 
  the 
  evening 
  : 
  — 
  

  

  " 
  Time 
  required 
  for 
  One 
  Eevolution. 
  

  

  " 
  Source 
  of 
  radiation. 
  Time 
  in 
  seconds. 
  

  

  " 
  1 
  candle, 
  20 
  inches 
  

   * 
  10 
  „ 
  

  

  55 
  5 
  „ 
  

  

  2 
  candles, 
  5 
  „ 
  

   4 
  „ 
  5 
  

  

  8 
  „ 
  5 
  „ 
  

  

  1 
  candle, 
  5 
  „ 
  

  

  55 
  5 
  „ 
  

  

  55 
  5 
  55 
  

  

  55 
  5 
  55 
  

  

  55 
  5 
  5? 
  

  

  55 
  ^ 
  55 
  

  

  Diffused 
  daylight, 
  dull 
  2-3 
  

  

  bright 
  1-7 
  

  

  Full 
  sunshine, 
  10 
  a.m 
  0*3 
  

  

  ■ 
  „ 
  „ 
  2p.m 
  0-25" 
  

  

  These 
  experiments 
  are 
  not 
  mentioned 
  in 
  the 
  paper 
  of 
  which 
  the 
  above 
  

   is 
  an 
  abstract, 
  as 
  it 
  is 
  intended 
  to 
  make 
  the 
  radiometer 
  the 
  subject 
  of 
  a 
  

   future 
  communication 
  to 
  the 
  Society. 
  

  

  Mr. 
  Lockyer 
  communicated 
  some 
  particulars 
  of 
  the 
  Eclipse 
  of 
  the 
  Sun, 
  

   April 
  6th, 
  as 
  observed 
  at 
  Bangkok, 
  Siam. 
  

  

  

  182 
  

   45 
  

   11 
  

  

  

  

  5 
  

  

  3 
  

  

  1-6 
  

  

  behind 
  green 
  glass 
  . 
  

  

  . 
  40 
  

  

  „ 
  blue 
  „ 
  . 
  

  

  . 
  38 
  

  

  „ 
  purple 
  „ 
  . 
  

  

  . 
  28 
  

  

  „ 
  orange 
  „ 
  . 
  

  

  . 
  26 
  

  

  „ 
  yellow 
  „ 
  . 
  

  

  . 
  21 
  

  

  „ 
  light 
  red 
  „ 
  . 
  

  

  . 
  20 
  

  

  April 
  29, 
  1875. 
  

  

  The 
  DUKE 
  OF 
  DEVONSHIRE, 
  K.G., 
  Vice-President, 
  in 
  

  

  the 
  Chair. 
  

  

  The 
  Eight 
  Hon. 
  W. 
  E. 
  Eorster 
  and 
  the 
  Eight 
  Hon. 
  Eussell 
  Grurney 
  

   were 
  admitted 
  into 
  the 
  Society. 
  

  

  The 
  Eight 
  Hon. 
  Sir 
  James 
  Colville, 
  whose 
  certificate 
  had 
  been 
  sus- 
  

   pended, 
  as 
  prescribed 
  by 
  the 
  Statutes, 
  was 
  balloted 
  for 
  and 
  elected 
  a 
  

   Eellow 
  of 
  the 
  Society. 
  

  

  The 
  Presents 
  received 
  were 
  laid 
  on 
  the 
  table, 
  and 
  thanks 
  ordered 
  for 
  

   them. 
  

  

  The 
  following 
  Papers 
  were 
  read 
  : 
  — 
  

  

  