﻿Alternating-Current 
  Spark 
  Potentials. 
  

   Table 
  V. 
  

  

  705 
  

  

  Diameter 
  of 
  spheres 
  15 
  cm. 
  Ratio 
  1'43. 
  Frequency 
  o£ 
  

   alternating 
  current 
  33. 
  Barometric 
  height 
  714 
  mm. 
  

   Temperature 
  20° 
  C. 
  

  

  Explosive 
  Distance 
  

  

  Effective 
  

  

  Maximum 
  i 
  

  

  in 
  cm. 
  

  

  Volts. 
  

  

  Volts. 
  1 
  

  

  0-1154 
  

  

  3318 
  

  

  4744 
  

  

  0-1534 
  

  

  4118 
  

  

  5888 
  

  

  0-1900 
  

  

  4868 
  

  

  6961 
  

  

  0-2365 
  

  

  6823 
  

  

  8326 
  

  

  0-2927 
  

  

  6940 
  

  

  9924 
  

  

  0-3766 
  

  

  8600 
  

  

  12298 
  

  

  0-4627 
  

  

  10231 
  

  

  14630 
  

  

  5426 
  

  

  11755 
  

  

  16809 
  

  

  0-6560 
  

  

  13882 
  

  

  19851 
  

  

  0-8172 
  

  

  16737 
  

  

  23933 
  

  

  0-9410 
  

  

  18995 
  

  

  27162 
  

  

  1-0109 
  

  

  20306 
  

  

  29037 
  

  

  1-2380 
  

  

  24201 
  

  

  34607 
  

  

  1-3546 
  

  

  26245 
  

  

  37530 
  

  

  1-4793 
  

  

  28268 
  

  

  40423 
  

  

  1-6514 
  

  

  31085 
  

  

  44451 
  

  

  1-8730 
  

  

  34683 
  

  

  49597 
  

  

  Table 
  YI. 
  

  

  Diameter 
  of 
  spheres 
  20 
  cm. 
  Ratio 
  1*43. 
  Frequency 
  of 
  

  

  alternating 
  current 
  33. 
  Barometric 
  height 
  716'4 
  mm. 
  

  

  Temperature 
  21° 
  C. 
  

  

  Explosive 
  Distance 
  

  

  Effective 
  

  

  Maximum 
  

  

  m 
  cm. 
  

  

  Volts. 
  

  

  Volts. 
  

  

  0-1148 
  

  

  3290 
  

  

  4704 
  

  

  0-1504 
  

  

  4063 
  

  

  5810 
  

  

  0-2357 
  

  

  5845 
  

  

  8358 
  

  

  0-2883 
  

  

  6896 
  

  

  9861 
  

  

  0-3817 
  

  

  8731 
  

  

  12485 
  

  

  0-4717 
  

  

  10436 
  

  

  14923 
  

  

  0-5444 
  

  

  11822 
  

  

  16905 
  

  

  0-6546 
  

  

  13888 
  

  

  19859 
  

  

  0-8123 
  

  

  16684 
  

  

  23858 
  

  

  0-9961 
  

  

  19993 
  

  

  28589 
  

  

  1-1088 
  

  

  21967 
  

  

  31412 
  

  

  1-2419 
  

  

  24252 
  

  

  34680 
  

  

  1-3540 
  

  

  26202 
  

  

  37468 
  

  

  1-4430 
  

  

  27756 
  

  

  39691 
  

  

  1-6310 
  

  

  30969 
  

  

  44285 
  

  

  