﻿Rowland 
  and 
  Penniman 
  — 
  Electrical 
  Measurements. 
  51 
  

  

  

  

  

  

  

  

  Cor- 
  

  

  Aver- 
  

  

  GJom. 
  

  

  

  Coils. 
  

  

  R". 
  

  

  Correc. 
  

  

  

  Queen. 
  

  

  R 
  + 
  r. 
  

  

  rec. 
  

  

  age. 
  

  

  A'. 
  

  

  Ratio. 
  

  

  •C 
  + 
  Pa 
  

  

  901-6 
  

  

  -14-55 
  

  

  887-05 
  

  

  u 
  

  

  92 
  

   99 
  

  

  1800-2 
  

   1806-5 
  

  

  --62 
  

   11 
  

  

  1802-6 
  

  

  1 
  

   2 
  

  

  2-0288 
  

  

  A 
  

  

  901-7 
  

  

  u 
  

  

  887-15 
  

  

  149 
  

  

  4776-5 
  

  

  11 
  

  

  4786-5 
  

  

  1 
  

  

  5-3956 
  

  

  (i 
  

  

  11 
  

  

  (( 
  

  

  (1 
  

  

  196 
  

  

  48180 
  

  

  (1 
  

  

  

  2 
  

  

  

  Current 
  increased 
  about 
  2|- 
  times. 
  

  

  

  

  

  

  A 
  

  

  (1 
  

  

  

  

  11 
  

  

  141 
  

  

  184 
  

  

  4787-0 
  

   4807- 
  

  

  (1 
  

   11 
  

  

  4781-3 
  

  

  1 
  

   2 
  

  

  5-3898 
  

  

  A 
  + 
  C 
  

  

  901-6 
  

  

  u 
  

  

  887-05 
  

  

  11 
  

  

  211 
  

   264 
  

  

  5936- 
  

  

  5982- 
  

  

  11 
  

   11 
  

  

  5958-3 
  

  

  1 
  

   2 
  

  

  6-7170 
  

  

  A 
  + 
  Cx 
  

  

  P2 
  ;; 
  

  

  

  11 
  

  

  51 
  

   104 
  

  

  6575-5 
  

   66310 
  

  

  11 
  

  

  6602-5 
  

  

  1 
  

   2 
  

  

  7-4430 
  

  

  A 
  

  

  902- 
  

  

  u 
  

  

  887-45 
  

  

  158 
  

  

  4778-9 
  

  

  (I 
  

  

  4795-25 
  

  

  1 
  

  

  5-4036 
  

  

  ii 
  

  

  u 
  

  

  a 
  

  

  <' 
  

  

  192 
  

  

  4813- 
  

  

  11 
  

  

  

  2 
  

  

  

  P1 
  + 
  P2 
  

  

  11 
  

  

  a 
  

  

  11 
  

  

  183 
  

  

  1146-5 
  

  

  11 
  

  

  1146-7 
  

  

  1 
  

  

  1-9922 
  

  

  (( 
  

  

  u 
  

  

  (1 
  

  

  (1 
  

  

  186 
  

  

  1148-5 
  

  

  11 
  

  

  

  2 
  

  

  

  P2 
  

  

  a 
  

  

  a 
  

  

  (I 
  

   11 
  

  

  7 
  

   8 
  

  

  643-15 
  

   643-6 
  

  

  11 
  

  

  642-67 
  

  

  1 
  

   2 
  

  

  -7242 
  

  

  Pi 
  

  

  u 
  

  

  i' 
  

  

  It 
  

  

  u 
  

  

  91 
  

  

  502-5 
  

   503-1 
  

  

  " 
  

  

  502-16 
  

  

  1 
  

   2 
  

  

  -5658 
  

  

  

  Double 
  

  

  Leads. 
  

  

  n 
  = 
  about 
  133 
  < 
  

  

  3omplete 
  a 
  

  

  xternations 
  per 
  ssc. 
  

  

  

  

  

  

  

  

  

  Cor- 
  

  

  Aver- 
  ( 
  

  

  :]om. 
  

  

  

  Coils. 
  

  

  R^ 
  

  

  Correc. 
  

  

  

  Queen. 
  

  

  R 
  + 
  r. 
  

  

  rec. 
  

  

  age. 
  

  

  A^ 
  

  

  Ratio. 
  

  

  Pa 
  

  

  901-9 
  

  

  -14-65 
  

  

  887-35 
  

  

  90+5 
  

  

  11 
  

  

  5004 
  

   50023 
  

  

  + 
  ■62 
  

   11 
  

  

  499-69 
  

  

  1 
  

  

  2 
  

  

  -5631 
  

  

  P2 
  

  

  u 
  

  

  " 
  

  

  11 
  

  

  3 
  

  

  639-35 
  

  

  " 
  

  

  638-85 
  

  

  1 
  

  

  -7198 
  

  

  -<i 
  

  

  kt 
  

  

  " 
  

  

  11 
  

  

  4 
  

  

  639-6 
  

  

  It 
  

  

  

  2 
  

  

  

  A 
  

  

  901-87 
  

  

  u 
  

  

  887-32 
  

  

  ? 
  

  

  4742-2 
  

  

  11 
  

  

  4750-48 
  

  

  1 
  

  

  5-3537 
  

  

  u 
  

  

  " 
  

  

  " 
  

  

  " 
  

  

  133 
  

  

  4760 
  

  

  11 
  

  

  

  2 
  

  

  

  C 
  

  

  u 
  

  

  901-9 
  

  

  11 
  

  

  11 
  

  

  887-35 
  

  

  11 
  

  

  44 
  

   44 
  

  

  1151-4 
  

   1151-4 
  

  

  11 
  

  

  1150-94 
  

  

  1 
  

  

  2 
  

  

  1-2970 
  

  

  In 
  the 
  above 
  determinations 
  the 
  coils 
  were 
  arranged 
  in 
  the 
  way 
  

   as 
  indicated 
  in 
  the 
  figure 
  having 
  leads 
  of 
  double 
  bell 
  wire. 
  

  

  A 
  Seeies 
  of 
  Determinations 
  of 
  A 
  under 
  various 
  conditions. 
  

   Open 
  resistance 
  R 
  on 
  table 
  (original 
  position). 
  

  

  

  

  

  

  

  

  Cor- 
  Aver- 
  

  

  Com. 
  

  

  

  Coils. 
  

  

  R". 
  

  

  Correc. 
  

  

  

  Queen. 
  

  

  R 
  + 
  r. 
  

  

  rec. 
  age. 
  

  

  A^ 
  

  

  Ratio. 
  

  

  A 
  

  

  11 
  

  

  902-0 
  

  

  11 
  

  

  -14-55 
  

  

  It 
  

  

  887-45 
  

  

  It 
  

  

  149 
  + 
  5 
  

   196 
  + 
  5 
  

  

  4776-5 
  

   4818- 
  

  

  --62 
  4786-58 
  

  

  11 
  

  

  1 
  

   2 
  

  

  5-3936 
  

  

  11 
  

  

  901-95 
  

  

  It 
  

  

  887-4 
  

  

  ? 
  

  

  4783-5 
  

  

  " 
  4795-38 
  

  

  1 
  

  

  5-403 
  

  

  u 
  

  

  " 
  

  

  it 
  

  

  887-4 
  

  

  190+5 
  

  

  4808-5 
  

  

  11 
  

  

  2 
  

  

  

  Open 
  resistance 
  R 
  moved 
  up 
  to 
  coil 
  A 
  (5J. 
  

  

  >i 
  11 
  II 
  It 
  9 
  9 
  11 
  • 
  

  

  ? 
  4518- 
  " 
  4517-38 
  2 
  

  

  Open 
  resistance 
  E, 
  moved 
  to 
  the 
  other 
  side 
  of 
  A 
  (h^). 
  

  

  5-0905 
  

  

  144 
  + 
  5 
  4518- 
  

   147+5 
  4521- 
  

  

  4518-88 
  1 
  5.0922 
  

   2 
  

  

  Coil 
  A 
  placed 
  in 
  P^ 
  position 
  and 
  open 
  resistance 
  R 
  restored 
  

   to 
  its 
  position, 
  and 
  159' 
  of 
  double 
  wire 
  added 
  to 
  the 
  circuit. 
  

  

  