﻿398 
  Prof. 
  J. 
  Joly 
  on 
  the 
  

  

  conditions, 
  seems 
  fully 
  brought 
  out 
  by 
  Eve^s 
  recent 
  experi- 
  

   ments, 
  which 
  read 
  from 
  0'75 
  to 
  1'85 
  &c., 
  &c. 
  

  

  The 
  following 
  table 
  contains 
  all 
  the 
  results 
  which 
  I 
  have 
  

   up 
  to 
  the 
  present 
  obtained 
  upon 
  sea 
  water. 
  Those 
  given 
  in 
  

   my 
  earlier 
  paper 
  are 
  summarized 
  in 
  the 
  entries 
  (l)-(5) 
  and 
  

   (6)- 
  (10). 
  (19) 
  has 
  also 
  been 
  already 
  dealt 
  with. 
  i\.n 
  arith- 
  

   metical 
  error 
  in 
  computing 
  the 
  constant 
  of 
  a 
  recently 
  

   constructed 
  electroscope 
  affected 
  the 
  original 
  values 
  given 
  

   for 
  (15) 
  and 
  (16). 
  A 
  misprint 
  (' 
  Radioactivity 
  and 
  Greology/ 
  

   p. 
  46) 
  slightly 
  affected 
  (23). 
  The 
  last 
  experiment 
  (25), 
  has 
  

   not 
  hitherto 
  been 
  published. 
  In 
  the 
  table 
  they 
  are 
  not 
  

   generally 
  listed 
  in 
  the 
  order 
  in 
  which 
  they 
  have 
  been 
  made 
  ; 
  

   (15) 
  and 
  (16) 
  are 
  two 
  of 
  the 
  latest. 
  

  

  Table 
  I. 
  

  

  Kadium 
  

   per 
  litre. 
  

  

  (1)- 
  (5) 
  Coast 
  round 
  Ireland 
  (5) 
  34 
  

  

  (6)-(10) 
  Atlantic 
  Ocean 
  ; 
  Madeira 
  to 
  Bay 
  of 
  Biscay 
  (5) 
  17 
  

  

  (11) 
  Atlantic, 
  New 
  York 
  to 
  Ireland, 
  Arctic 
  Current 
  14 
  

  

  (12) 
  „ 
  „ 
  „ 
  Gulf 
  Stream 
  14 
  

  

  (13) 
  ,. 
  „ 
  „ 
  Mid 
  Atlantic 
  11 
  

  

  (14) 
  „ 
  „ 
  „ 
  260 
  m. 
  W. 
  of 
  Ireland. 
  8 
  

  

  (15) 
  „ 
  lat. 
  0° 
  0', 
  long. 
  31° 
  26' 
  W 
  23 
  

  

  (16) 
  „ 
  lat. 
  16° 
  54' 
  S., 
  long. 
  37° 
  29' 
  W. 
  4 
  

  

  (17) 
  Mediterranean 
  14 
  

  

  (18) 
  Black 
  Sea 
  7 
  

  

  (19) 
  Arabian 
  Sea, 
  lat. 
  10° 
  40' 
  N., 
  long. 
  58° 
  0' 
  E 
  27 
  

  

  (20) 
  Indian 
  Ocean 
  to 
  Mediterranean 
  ; 
  Sandheads 
  to 
  Madras. 
  4 
  

  

  (21) 
  „ 
  „ 
  off 
  Colombo 
  7 
  

  

  (22) 
  ,, 
  „ 
  Minicoy 
  to 
  Sokotra 
  . 
  4 
  

  

  (23) 
  „ 
  „ 
  KedSeaoff" 
  Jiddah.. 
  6 
  

  

  (24) 
  ,, 
  J, 
  Mediterranean 
  2 
  

  

  (25) 
  Valentia 
  • 
  4 
  

  

  As 
  regards 
  the 
  precautions 
  taken 
  in 
  carrying 
  out 
  these 
  

   experiments 
  the 
  following 
  remarks 
  apply 
  to 
  all 
  alike. 
  When- 
  

   ever 
  evaporation 
  was 
  required 
  it 
  was 
  carried 
  out 
  in 
  the 
  

   recently 
  opened 
  Botanical 
  Laboratory 
  of 
  Trinity 
  College. 
  In 
  

   this 
  laboratory 
  all 
  the 
  apparatus 
  and 
  fittings 
  are 
  new 
  and 
  no 
  

   radium 
  work 
  has 
  ever 
  been 
  done 
  in 
  the 
  building. 
  The 
  acid 
  

   used 
  was 
  a 
  ^ 
  re-distilled 
  ' 
  HCl 
  which 
  I 
  tested 
  at 
  intervals. 
  

   Allowance 
  was 
  made 
  for 
  a 
  very 
  small 
  trace 
  of 
  radium 
  — 
  

   almost 
  negligible. 
  The 
  final 
  testing 
  was 
  carried 
  out 
  in 
  flasks 
  

   of 
  (R) 
  glass, 
  which 
  were 
  procured 
  for 
  the 
  purpose 
  and 
  not 
  

   used 
  for 
  any 
  other. 
  The 
  rubber 
  stoppers 
  were 
  also 
  new 
  and 
  

   reserved 
  for 
  this 
  special 
  use. 
  In 
  effecting 
  the 
  experiment 
  

   the 
  increased 
  rate 
  of 
  discharge 
  of 
  the 
  electroscope 
  was 
  

  

  