﻿56 
  

  

  Roioland 
  and 
  Penniman 
  — 
  Electrical 
  Measurements. 
  

  

  Collected 
  Results. 
  

  

  i 
  

  

  '/I 
  = 
  133. 
  

   Results 
  found 
  by 
  taking 
  sum 
  

   and 
  diff. 
  of 
  separate 
  

   measurements. 
  

   •5648 
  (C 
  + 
  Pj)-C 
  = 
  Pi 
  

   •5730 
  (C 
  + 
  Pi+P2)-(C 
  + 
  Po)r=Pj 
  

   •7187 
  (C 
  + 
  P2)-C 
  = 
  P2 
  

   •7269 
  (C 
  + 
  Pi 
  + 
  P2)-(C 
  + 
  Pi)=:P2 
  

   1-3029 
  (C 
  + 
  Pi)-Pi 
  = 
  C 
  

   1-2990 
  (C 
  + 
  P2)-P2 
  = 
  C 
  

   1^3065 
  (C 
  + 
  Pi+P2)-Pi-2 
  = 
  C 
  

   5^3022 
  (A 
  + 
  C)-C=A 
  

   1-2917 
  (C 
  + 
  Pi 
  + 
  P2)-C=Pi+P2 
  

   1-2888 
  P1 
  + 
  P2 
  

  

  1-8677 
  C 
  + 
  Pi 
  

  

  1-8718 
  (C 
  + 
  Pi+P2)-Po 
  = 
  C 
  + 
  Pi 
  

   2-0298 
  (C 
  + 
  Pi 
  + 
  Po)— 
  Pi 
  = 
  C 
  + 
  P2 
  

   2-5920 
  Pi+Po 
  + 
  C 
  

  

  6^6025 
  A 
  + 
  C 
  = 
  A 
  + 
  C 
  

  

  In 
  Method 
  12 
  connections 
  due 
  to 
  the 
  hanging 
  coil 
  and 
  fixed 
  

   coils 
  were 
  calculated 
  so 
  that 
  the 
  ratio 
  of 
  the 
  resistances 
  would 
  

   give 
  the 
  ratio 
  of 
  the 
  self-inductances 
  direct. 
  In 
  this 
  method 
  

   (6) 
  since 
  the 
  capacity 
  was 
  in 
  circuit 
  with 
  the 
  hanging 
  coil, 
  the 
  

   self-inductance 
  was 
  so 
  small 
  that 
  it 
  was 
  neglected. 
  The 
  self- 
  

   inductance 
  of 
  the 
  coils 
  P, 
  etc., 
  which 
  were 
  joined 
  in 
  circuit 
  

   with 
  the 
  fixed 
  coils, 
  were 
  increased 
  by 
  the 
  self-inductance 
  of 
  

   the 
  fixed 
  coils, 
  that 
  is 
  by 
  '0164 
  henry. 
  

  

  The 
  table 
  below 
  give 
  the 
  various 
  results. 
  

  

  

  

  Results 
  found 
  

  

  Results 
  found 
  

  

  

  w=40. 
  

  

  by 
  taking 
  

  

  by 
  direct 
  

  

  

  Results 
  found 
  

  

  sum 
  diff., 
  etc., 
  

  

  meas. 
  of 
  coils 
  

  

  

  by 
  direct 
  

  

  of 
  separate 
  

  

  and 
  combination 
  

  

  Coils. 
  

  

  measurement. 
  

  

  meas. 
  

  

  of 
  coils. 
  

  

  Pi 
  

  

  •5664 
  

  

  •5663 
  

   •5734 
  

  

  •5653 
  

  

  P2 
  

  

  •7251 
  

  

  •7211 
  

  

  •7233 
  

  

  (( 
  

  

  

  •7282 
  

  

  

  C 
  

  

  r3050 
  

  

  1-3049 
  

  

  1-3034 
  

  

  

  

  1-3010 
  

   1-30 
  ;o 
  

  

  

  A 
  

  

  5-3080 
  

  

  5-3175 
  

  

  5^2991 
  

  

  P1 
  + 
  P2 
  

  

  

  1-2945 
  

   1-2915 
  

  

  

  C 
  + 
  Pi 
  

  

  r87l3 
  

  

  1-8714 
  

  

  1-8683 
  

  

  u 
  

  

  

  1-8744 
  

  

  

  C-FP2 
  

  

  2^0261 
  

  

  20331 
  

  

  2-0221 
  

  

  C-FPi-hP2 
  

  

  2-5995 
  

  

  2^5965 
  

  

  2-5951 
  

  

  A+C 
  

  

  6-6225 
  

  

  6^6130 
  

  

  6-6054 
  

  

  

  

  

  Queen 
  in 
  

  

  

  I 
  

  

  'OSltlC 
  

  

  )n 
  

  

  

  

  

  

  

  current 
  with 
  

  

  

  

  of 
  

  

  

  

  Cor. 
  

  

  N. 
  

  

  Coil 
  

  

  . 
  R"+r. 
  

  

  R" 
  + 
  r. 
  

  

  R-hr. 
  

  

  Product. 
  

  

  A'. 
  

  

  L. 
  

   -7251 
  

  

  C. 
  

  

  C. 
  

  

  40 
  

  

  u 
  

  

  P 
  

  

  2008- 
  

   2005^ 
  

  

  205- 
  

   200- 
  

  

  1095 
  7 
  

  

  u 
  

  

  2198522- 
  

  

  1 
  

   2 
  

  

  •0164 
  

   -7415 
  

  

  -3373 
  

  

  

  133 
  

  

  (( 
  

  

  2024-5 
  

  

  221- 
  

  

  1. 
  

  

  2218792^ 
  

  

  1 
  

  

  -7233 
  

  

  

  

  {( 
  

  

  a 
  

  

  2025-5 
  

  

  222- 
  

  

  ■ 
  ( 
  

  

  

  2 
  

  

  •0164 
  

   -7397 
  

  

  -3330 
  

  

  •3323 
  

  

  40 
  

  

  A 
  

  

  127415 
  

  

  30- 
  

  

  1241-85 
  

  

  15922394^ 
  

  

  1 
  

  

  5-3080 
  

  

  

  

  u 
  

  

  11 
  

  

  12720- 
  

  

  30- 
  

   236- 
  

  

  u 
  

   (1 
  

  

  15775610- 
  

  

  2 
  

  

  1 
  

  

  •0164 
  

  

  •3344 
  

  

  

  

  5-3244 
  

  

  

  133 
  

  

  5-2991 
  

  

  

  " 
  

  

  c 
  

  

  12716- 
  

   3430-8 
  

  

  220- 
  

  

  98^ 
  

  

  1140-8 
  

  

  3911004- 
  

  

  2 
  

  

  1 
  

  

  •0164 
  

  

  •3368 
  

  

  •3363 
  

  

  

  5-3155 
  

  

  

  40 
  

  

  1-3050 
  

  

  

  " 
  

  

  

  3425-8 
  

  

  93- 
  

  

  

  

  2 
  

  

  •0164 
  

  

  •3379 
  

  

  

  

  1-3214 
  

  

  

  