﻿448 
  

  

  ON 
  THE 
  RELATIVE 
  HORIZONTAL 
  INTENSITIES 
  

  

  TABLE 
  No. 
  VI. 
  

  

  Observations 
  at 
  Philadelphia. 
  — 
  First 
  Series. 
  

  

  

  Cm 
  

  

  , 
  

  

  

  

  

  

  

  

  <D 
  

  

  ■L« 
  

  

  £ 
  6 
  e> 
  1 
  A 
  & 
  8 
  S» 
  

  

  s 
  — 
  

  

  

  

  

  O 
  

  

  C 
  . 
  

  

  O 
  o 
  

  

  3 
  

  

  

  Time 
  of 
  Beginning 
  

  

  ■SB 
  

  

  

  s 
  • 
  

  

  

  tM 
  < 
  

  

  o 
  

  

  ° 
  ft 
  CK 
  

  

  5 
  -«2 
  s 
  

  

  ■go 
  g 
  

  

  State 
  

  

  Observers' 
  

  

  

  5 
  o 
  

  

  

  

  Experiment. 
  

  

  *-£ 
  '*< 
  

  

  O 
  a 
  

  

  C 
  P 
  

  

  rt 
  d 
  — 
  

  

  •|Stl 
  

  

  '■§ 
  sHE-i 
  

  

  a 
  a 
  ■ 
  2 
  

  

  1)*" 
  

  

  of 
  the 
  

  

  Names. 
  

  

  oE 
  

   6 
  

  

  IB 
  

  

  o 
  g 
  

  

  o 
  

  

  

  

  

  

  3 
  

  

  p 
  

  

  o 
  '-P 
  

  

  6 
  

  

  o 
  

  

  

  a 
  g.e 
  

  

  3 
  '£ 
  "o 
  T3 
  

  

  o 
  Si 
  o 
  c 
  

  

  o 
  . 
  

   O 
  o 
  

  

  Weather. 
  

  

  

  Zi 
  

  

  P 
  

  

  Q 
  

  

  

  

  

  

  

  z; 
  

  

  

  

  

  

  

  

  

  

  Hours. 
  

  

  Mins. 
  

  

  Sec. 
  

  

  Sees. 
  

  

  

  Fah.° 
  

  

  Degs. 
  

  

  Sees. 
  

  

  Sees. 
  

  

  Sees. 
  

  

  

  

  1 
  

  

  No. 
  1. 
  

  

  May 
  

  

  16 
  

  

  P.M. 
  6 
  

  

  13 
  

  

  13.8 
  

  

  2209 
  8 
  

  

  480 
  

  

  60.0 
  

  

  35 
  to 
  5 
  

  

  2198.1 
  

  

  2198.1 
  

  

  45.79 
  

  

  Clear. 
  

   Cumulus. 
  

  

  H. 
  D. 
  Rogers 
  

   and 
  Bache. 
  

  

  2 
  

  

  u 
  

  

  « 
  

  

  30 
  

  

  " 
  5 
  

  

  29 
  

  

  42.2 
  

  

  2049.8 
  

  

  440 
  

  

  85.7 
  

  

  « 
  

  

  2038.9 
  

  

  2015.7 
  

  

  45.81 
  

  

  Hazy. 
  

  

  Bache. 
  

  

  3 
  

  

  a 
  

  

  Aug. 
  

  

  5 
  

  

  A.M. 
  7 
  

  

  21 
  

  

  09.6 
  

  

  3035.6 
  

  

  654 
  

  

  83.5 
  

  

  20 
  to 
  3 
  

  

  3029.9 
  

  

  2998.4 
  

  

  45.84 
  

  

  Clear. 
  

  

  u 
  

  

  4 
  

  

  tt 
  

  

  it 
  

  

  ti 
  

  

  « 
  8 
  

  

  33 
  

  

  04.8 
  

  

  1035.6 
  

  

  232 
  

  

  87.5 
  

  

  20 
  "10 
  

  

  1081.3 
  

  

  1068.1 
  

  

  46.04 
  

  

  a 
  

  

  a 
  

  

  5 
  

  

  a 
  

  

  a 
  

  

  tt 
  

  

  P.M. 
  7 
  

  

  04 
  

  

  56.0 
  

  

  2372.0 
  

  

  510 
  

  

  87.2 
  

  

  20" 
  3 
  

  

  2367.5 
  

  

  2339.2 
  

  

  45.87 
  

  

  a 
  

  

  it 
  

  

  6 
  

  

  tt 
  

  

  ti 
  

  

  20 
  

  

  " 
  3 
  

  

  58 
  

  

  10.8 
  

  

  2082.4 
  

  

  452 
  

  

  92.9 
  

  

  19" 
  3 
  

  

  2078.8 
  

  

  2048.7 
  

  

  45.33 
  

  

  Clear. 
  

   Cumulus. 
  

  

  a 
  

  

  7 
  

  

  .t 
  

  

  a 
  

  

  ti 
  

  

  " 
  8 
  

  

  14 
  

  

  12.0 
  

  

  2486.8 
  

  

  538 
  

  

  93.5 
  

  

  20 
  " 
  3 
  1 
  2481.7 
  

  

  2444.9 
  

  

  45.45 
  

  

  tc 
  

  

  a' 
  

  

  8 
  

  

  a 
  

  

  n 
  

  

  tt 
  

  

  " 
  10 
  

  

  24 
  

  

  33.6 
  

  

  2212.4 
  

  

  486 
  

  

  55.5 
  

  

  20" 
  3 
  

  

  2208.2 
  

  

  2212.6 
  

  

  45,53 
  

  

  a 
  

  

  tt 
  

  

  9 
  

  

  tt 
  

  

  tt 
  

  

  25 
  

  

  " 
  8 
  

  

  10 
  

  

  05.2 
  

  

  1660.4 
  

  

  356 
  

  

  99.1 
  

  

  20" 
  5 
  

  

  1656.1 
  

  

  1627.4 
  

  

  45.71 
  

  

  Cloudy. 
  

  

  tt 
  

  

  10 
  

  

  a 
  

  

  " 
  

  

  it 
  

  

  " 
  11 
  

  

  51 
  

  

  16.4 
  

  

  1684.4 
  

  

  362 
  

  

  98.0 
  

  

  20" 
  5 
  

  

  1680.0 
  

  

  1651.7 
  

  

  45.63 
  

  

  " 
  

  

  " 
  

  

  14 
  

  

  No. 
  3. 
  

  

  June 
  

  

  26 
  P.M. 
  7 
  

  

  10 
  

  

  00 
  

  

  1086.8 
  

  

  220 
  

  

  82.5 
  

  

  30" 
  5 
  

  

  1082.1 
  

  

  1071.3 
  

  

  48.68 
  

  

  

  Bache. 
  

  

  15 
  

  

  a 
  

  

  July 
  

  

  12 
  

  

  " 
  4 
  

  

  31 
  

  

  28.0 
  

  

  1411.8 
  

  

  290 
  

  

  84.5 
  

  

  15" 
  2 
  

  

  1410.4 
  

  

  1395.1 
  

  

  48.11 
  

  

  Cloudy. 
  

  

  tt 
  

  

  16 
  

  

  a 
  

  

  a 
  

  

  " 
  

  

  " 
  5 
  

  

  14 
  

  

  00 
  

  

  1460.8 
  

  

  300 
  

  

  83.5 
  

  

  15" 
  3 
  

  

  1459.0 
  

  

  1443.8 
  

  

  48.13 
  

  

  

  a 
  

  

  17 
  

  

  " 
  

  

  Aug. 
  

  

  20 
  

  

  " 
  6 
  

  

  04 
  

  

  39.6 
  

  

  1290.8 
  

  

  204 
  

  

  84.4 
  

  

  20" 
  3 
  

  

  1288.4 
  

  

  1274.5 
  

  

  48.28 
  

  

  Clear. 
  

  

  n 
  

  

  18 
  

  

  ti 
  

  

  tt 
  

  

  25 
  

  

  " 
  9 
  

  

  51 
  

  

  22.2 
  

  

  894.0 
  

  

  182 
  

  

  102.2 
  

  

  20" 
  5 
  

  

  891.7 
  

  

  875.0 
  

  

  48.08 
  

  

  Cloudy. 
  

  

  Bache 
  and 
  

   Courtenay. 
  

  

  Needle 
  No 
  1 
  

  

  . 
  Whole 
  No. 
  of 
  Vibrations 
  4510 
  ; 
  Whole 
  time, 
  20,604.8 
  Sees.; 
  Mean 
  Time 
  of 
  Ten 
  Vibrations, 
  45.687 
  Sees. 
  

  

  

  !. 
  

  

  a 
  

  

  

  1256; 
  " 
  6,059.7 
  " 
  " 
  

  

  48.246 
  " 
  

  

  TABLE 
  No. 
  VII. 
  

  

  Observations 
  at 
  West 
  Point. 
  — 
  First 
  Series. 
  

  

  

  cm 
  

  

  ri 
  

  

  

  

  m 
  

  

  o 
  

  

  c-3 
  

  

  * 
  i, 
  6 
  1 
  * 
  i 
  8 
  6 
  

  

  o 
  

  

  

  Ph 
  

  

  * 
  _ 
  

  

  o 
  = 
  

   d 
  

  

  d 
  . 
  

   = 
  £ 
  

  

  CO 
  ^ 
  

  

  o 
  

  

  > 
  

  

  M 
  

  

  m 
  

  

  og 
  

  

  o 
  

   o 
  

  

  

  O 
  g 
  

  

  r 
  

  

  1 
  L 
  

  

  P 
  

  

  O 
  

  

  *o 
  

   w 
  

  

  

  

  o 
  

  

  a* 
  

  

  EtM 
  

  

  O 
  O 
  

  

  ■g 
  3-a 
  

  

  o 
  bJD 
  

  

  fi 
  *» 
  ,o 
  

  

  O 
  C 
  "" 
  

  

  s 
  3 
  = 
  «j 
  

   3 
  '^ 
  " 
  

  

  P 
  S.-B 
  

  

  Cm 
  *= 
  

  

  ° 
  ft 
  o- 
  

  

  T5 
  S 
  ~ 
  E 
  -1 
  

  

  s 
  s 
  a 
  

  

  Shu's 
  

  

  o 
  ° 
  

  

  Observers' 
  Names. 
  

  

  2; 
  

  

  Q 
  

  

  cj 
  

  

  

  

  

  

  

  

  

  

  

  

  a 
  

  

  

  Sees. 
  

  

  il 
  

  

  Fah.° 
  

  

  Degs. 
  

  

  Sees. 
  

  

  Sees. 
  

  

  Sees. 
  

  

  

  1 
  

  

  No.l. 
  

  

  April 
  

  

  21 
  

  

  953.8 
  

  

  200 
  

  

  63 
  

  

  25 
  a 
  15 
  

  

  945.6 
  

  

  944.3 
  

  

  47.22 
  

  

  Courtenay 
  and 
  Bache. 
  

  

  2 
  

  

  

  " 
  

  

  22 
  

  

  752.5 
  

  

  160 
  

  

  49 
  

  

  25 
  a 
  10* 
  

  

  758.4 
  

  

  752.1 
  

  

  47.01 
  

  

  tt 
  

  

  3 
  

  

  

  June 
  

  

  2 
  

  

  960.5 
  

  

  200 
  

  

  74 
  

  

  30 
  a 
  15 
  

  

  952.2 
  

  

  946.5 
  

  

  47.32 
  

  

  Courtenay 
  and 
  Cram. 
  

  

  4 
  

  

  

  <i 
  

  

  It 
  

  

  1142.4 
  

  

  238 
  

  

  C£ 
  

  

  a 
  

  

  1132.6 
  

  

  1125.8 
  

  

  47.30 
  

  

  tt 
  

  

  5 
  

  

  

  tt 
  

  

  9 
  

  

  971.7 
  

  

  200 
  

  

  89.2 
  

  

  tt 
  

  

  963.3 
  

  

  950.8 
  

  

  47.54 
  

  

  a 
  

  

  6 
  

  

  

  tt 
  

  

  C< 
  

  

  1018.7 
  

  

  210 
  

  

  tt 
  

  

  a 
  

  

  1010.0 
  

  

  990.9 
  

  

  47.47 
  

  

  it 
  

  

  7 
  

  

  

  it 
  

  

  14 
  

  

  1958.5 
  

  

  410 
  

  

  66* 
  

  

  30 
  a 
  5 
  

  

  1950.0 
  

  

  1944.6 
  

  

  47.43 
  

  

  it 
  

  

  8 
  

  

  

  July 
  

  

  1 
  

  

  1913.7 
  

  

  400 
  

  

  74 
  

  

  30 
  a 
  4 
  

  

  1906.3 
  

  

  1894.9 
  

  

  47.37 
  

  

  Courtenay. 
  

  

  y 
  

  

  

  it 
  

  

  ti 
  

  

  1916.5 
  

  

  tt 
  

  

  79 
  

  

  30 
  a 
  5 
  

  

  1908.2 
  

  

  1892.1 
  

  

  47.30 
  

  

  ti 
  

  

  10 
  

  

  

  a 
  

  

  3 
  

  

  1919.2 
  

  

  tt 
  

  

  74 
  i 
  

  

  tt 
  

  

  1910.9 
  

  

  1899.0 
  

  

  47.47 
  

  

  tt 
  

  

  n 
  

  

  

  ti 
  

  

  7 
  

  

  1920.8 
  

  

  tt 
  

  

  82 
  

  

  30 
  a 
  6* 
  

  

  1917.2 
  

  

  1898.5 
  

  

  47.40 
  

  

  tt 
  

  

  12 
  

  

  

  a 
  

  

  8 
  

  

  1924.0 
  

  

  tt 
  

  

  81 
  

  

  ti 
  

  

  1914.4 
  

  

  1896.4 
  

  

  47.41 
  

  

  it 
  

  

  13 
  

  

  

  a 
  

  

  12 
  

  

  955.5 
  

  

  200 
  

  

  71 
  

  

  20 
  a 
  10* 
  

  

  951.5 
  

  

  946.9 
  

  

  47.34 
  

  

  11 
  

  

  14 
  J 
  

  

  

  ti 
  

  

  ti 
  

  

  955.7 
  

  

  tt 
  

  

  78 
  

  

  20 
  a 
  7 
  

  

  952.8 
  

  

  945.3 
  

  

  47.26 
  

  

  it 
  

  

  15 
  

  

  

  a 
  

  

  << 
  

  

  956.1) 
  

  

  tt 
  

  

  72* 
  

  

  20 
  a 
  7* 
  

  

  953.1 
  

  

  947.9 
  

  

  47.39 
  

  

  it 
  

  

  10 
  

  

  

  Aug. 
  

  

  12 
  

  

  1675.5 
  

  

  348 
  

  

  86 
  

  

  20a 
  3 
  

  

  1672.3 
  

  

  1653.0 
  

  

  47.50 
  

  

  Courtenay 
  and 
  Bache. 
  

  

  25 
  

  

  No. 
  3. 
  

  

  April 
  

  

  22 
  

  

  515.5 
  

  

  100 
  

  

  52 
  

  

  30 
  a 
  14 
  

  

  501.4 
  

  

  592.5 
  

  

  50.25 
  

  

  u 
  

  

  26 
  

  

  

  May 
  

  

  28 
  

  

  515.2 
  

  

  " 
  

  

  64 
  

  

  40 
  a 
  19 
  

  

  508.0 
  

  

  507.4 
  

  

  50.74 
  

  

  Courtenay 
  and 
  Cram. 
  

  

  27 
  

  

  

  tt 
  

  

  30 
  

  

  516.1 
  

  

  " 
  

  

  a 
  

  

  40 
  a 
  22 
  

  

  508.1 
  

  

  507.5 
  

  

  50.75 
  

  

  a 
  

  

  28 
  

  

  

  June 
  

  

  2 
  

  

  517.0 
  

  

  tt 
  

  

  7H 
  

  

  40 
  a 
  17 
  

  

  510.4 
  

  

  508.8 
  

  

  50.88 
  

  

  tt 
  

  

  29 
  

  

  

  tt 
  

  

  9 
  

  

  520.7 
  

  

  tt 
  

  

  89-i 
  

  

  39 
  a 
  21 
  

  

  513.1 
  

  

  508.9 
  

  

  50.89 
  

  

  it 
  

  

  30 
  

  

  

  Aug. 
  

  

  7 
  

  

  1537.8 
  

  

  300 
  

  

  82 
  

  

  30 
  a 
  4 
  

  

  1531 
  .9 
  

  

  1522.5 
  

  

  50.75 
  

  

  Courtenay. 
  

  

  31 
  

  

  

  tt 
  

  

  8 
  

  

  1543.9 
  

  

  tt 
  

  

  84 
  

  

  tt 
  

  

  1537.9 
  

  

  1527.5 
  

  

  50.92 
  

  

  tt 
  

  

  Neec 
  

  

  le 
  No. 
  ] 
  

  

  L. 
  WholeNo.ofVibs.' 
  

  

  566; 
  whole 
  time, 
  21 
  ,635.0 
  sees.; 
  

  

  Meant 
  

  

  me 
  of 
  10 
  Vibs. 
  at 
  60°47.381 
  . 
  

  

  

  

  3. 
  

  

  " 
  

  

  1100; 
  5,585.1 
  

  

  

  50.774. 
  

  

  