﻿Earth's 
  Penetrating 
  Radiation 
  ivith 
  Wulf 
  Electrometer. 
  745 
  

   III. 
  Measurements 
  on 
  the 
  Atlantic 
  Ocean. 
  

  

  The 
  readings 
  taken 
  on 
  the 
  two 
  voyages 
  referred 
  to 
  above 
  

   are 
  given 
  in 
  Table 
  II. 
  

  

  Table 
  II. 
  

   Measurements 
  on 
  the 
  ionization 
  in 
  a 
  closed 
  vessel 
  taken 
  

   on 
  a 
  steamer 
  on 
  the 
  Atlantic 
  Ocean 
  with 
  a 
  Wulf 
  

   electrometer. 
  

  

  Voyage 
  No. 
  I. 
  on 
  SS. 
  ' 
  Hesperian.' 
  

  

  Sept. 
  14, 
  

   15, 
  

   16, 
  

   17, 
  

   18, 
  

   19, 
  

   20, 
  

   21, 
  

   22, 
  

  

  1912... 
  

  

  ... 
  Firth 
  of 
  Clyde 
  

  

  4*4 
  ions 
  per 
  c.c. 
  per 
  sec. 
  

  

  4-2 
  

  

  4-5 
  

  

  41 
  

  

  4-3 
  

  

  4-3 
  

  

  4-1 
  

  

  4-0 
  

  

  4-5 
  

   =4"3 
  ions 
  per 
  c.c. 
  per 
  sec. 
  

  

  . 
  . 
  . 
  On 
  the 
  Ocean 
  

  

  

  

  

  ... 
  Off 
  Belle 
  Isle 
  

  

  Off 
  Romouski 
  

  

  River 
  St. 
  Lawrence, 
  near 
  

   Quebec 
  

  

  Mean 
  - 
  

  

  Voyage 
  No. 
  II. 
  on 
  SS. 
  ' 
  Megantic.' 
  

  

  June 
  24, 
  

   25, 
  

  

  26, 
  

  

  27, 
  

   28, 
  

   29, 
  

   30, 
  

   July 
  1, 
  

  

  1913... 
  

  

  ... 
  River 
  St. 
  Lawrence 
  

  

  ... 
  River 
  and 
  Gulf 
  of 
  St. 
  

   Lawrence 
  

  

  ... 
  Gulf 
  of 
  St. 
  Lawrence 
  and 
  

   Atlantic 
  

  

  ... 
  Atlantic 
  Ocean 
  

  

  5'57 
  ions 
  per 
  c.c. 
  per 
  sec. 
  

  

  526 
  

  

  5-07 
  

   4-64 
  

   4-80 
  

   4-41 
  

   4-20 
  

  

  4-44 
  

   =4*35 
  ions 
  per 
  c.c. 
  per 
  sec. 
  

  

  

  

  . 
  . 
  . 
  Off 
  Nor 
  th 
  Coast 
  of 
  Ireland 
  

   and 
  Irish 
  Sea 
  

  

  Mean 
  of 
  last 
  three 
  readings: 
  

  

  The 
  readings 
  taken 
  on 
  the 
  first 
  voyage, 
  it 
  will 
  be 
  seen, 
  are 
  

   quite 
  regular 
  and 
  uniformly 
  low. 
  Their 
  average 
  was 
  4*3 
  ions 
  

   per 
  c.c. 
  per 
  sec. 
  The 
  lowest 
  reading, 
  4*0 
  ions 
  per 
  c.c. 
  per 
  sec, 
  

   was 
  that 
  taken 
  on 
  Sept. 
  21, 
  the 
  day 
  on 
  which 
  the 
  steamer 
  

   was 
  passing 
  from 
  the 
  Gulf 
  into 
  the 
  River 
  St. 
  Lawrence. 
  

  

  