﻿AT 
  VARIOUS 
  PLACES 
  IN 
  THE 
  UNITED 
  STATES. 
  

  

  211 
  

  

  Needle. 
  

  

  Observed 
  Dip. 
  

  

  Date 
  of 
  Observation. 
  

  

  Observer. 
  

  

  Weather, 
  &c. 
  

  

  No. 
  1, 
  

   No. 
  2, 
  

   No. 
  2, 
  

  

  70° 
  56'. 
  5 
  

   70 
  59 
  .7 
  

   70 
  59 
  .5 
  

  

  July 
  19th. 
  

   5 
  P.M. 
  

  

  E. 
  H. 
  Courtenay. 
  

  

  Clear. 
  

  

  Mean, 
  

  

  70 
  58 
  .6 
  

  

  

  

  

  MAGNETIC 
  DIP 
  AT 
  PHILADELPHIA, 
  PENNSYLVANIA. 
  

  

  These 
  observations 
  were 
  made 
  upon 
  a 
  marble 
  column 
  in 
  the 
  yard 
  

   to 
  the 
  south 
  of 
  Professor 
  Bache's 
  dwelling, 
  in 
  Chestnut 
  street 
  near 
  

   Schuylkill 
  Sixth 
  street. 
  The 
  details 
  of 
  the 
  separate 
  observations 
  are 
  

   given. 
  The 
  latitude 
  of 
  Philadelphia 
  is 
  39° 
  56' 
  59"; 
  and 
  the 
  longi- 
  

   tude, 
  according 
  to 
  the 
  determination 
  given 
  by 
  Mr 
  S. 
  C. 
  Walker 
  in 
  

   the 
  fifth 
  volume 
  of 
  the 
  Society's 
  Transactions, 
  is 
  75° 
  11' 
  31". 
  

  

  Needle. 
  

  

  Limb. 
  

  

  Nee- 
  

   dle. 
  

  

  Observed 
  

   Dip 
  

  

  Remarks, 
  &c. 
  

  

  Needle. 
  

  

  Limb. 
  

  

  Nee- 
  

   dle. 
  

  

  Observed 
  

   Dip. 
  

  

  Remarks, 
  &c. 
  

  

  

  r 
  

  

  So 
  j 
  

  

  o 
  ■- 
  *l 
  

  

  p-;3 
  | 
  

   I 
  

  

  CO 
  © 
  

   ® 
  M 
  J 
  

  

  "o 
  © 
  *\ 
  

   S 
  1 
  

  

  W. 
  

   E. 
  

   E. 
  

   W. 
  

   W. 
  

   E. 
  

   E. 
  

   W. 
  

  

  E. 
  

  

  w. 
  

  

  E. 
  

   W. 
  

   W. 
  

   E. 
  

   W. 
  

   E. 
  

  

  71°33' 
  

   72 
  32 
  

  

  71 
  42 
  

  

  72 
  13.5 
  

  

  71 
  17 
  

  

  72 
  15.5 
  

  

  71 
  45.5 
  

  

  72 
  21 
  

  

  July 
  25th, 
  

  

  1834. 
  

  

  About 
  7 
  P.M. 
  

  

  Sum 
  

   575° 
  39'. 
  5 
  

  

  Observers, 
  

   E. 
  H. 
  Courte- 
  

   nay 
  and 
  A. 
  D. 
  

   Bache. 
  

  

  1 
  

   \ 
  

  

  Sum 
  576° 
  14' 
  

  

  

  r 
  

  

  <o 
  o 
  ! 
  

   o 
  £ 
  "S 
  

  

  ^=3 
  1 
  

   I 
  

  

  mo 
  

   © 
  w 
  J 
  

  

  IS) 
  

  

  Ph 
  > 
  1 
  

  

  E. 
  

   W. 
  

  

  W. 
  

   E. 
  

   E. 
  

   W. 
  

   W. 
  

   E. 
  

  

  w. 
  

  

  E. 
  

   W. 
  

   E. 
  

   W. 
  

  

  E. 
  

   W. 
  

   E. 
  

  

  71°42' 
  

  

  72 
  16 
  

  

  71 
  19.5 
  

  

  72 
  45 
  

   72 
  31 
  .5 
  

  

  71 
  23.5 
  

  

  72 
  16 
  

   71 
  52.5 
  

  

  August 
  4th, 
  

  

  1834. 
  

  

  Finished 
  at 
  

  

  8 
  P.M. 
  

  

  Weather 
  clear. 
  

  

  (Cumulus.) 
  

  

  Wind 
  S. 
  W. 
  

  

  Tem. 
  77° 
  Fah. 
  

  

  Sum 
  

  

  576° 
  06'. 
  

  

  Observer, 
  

   A. 
  D. 
  Bache. 
  

  

  Sum 
  

   576° 
  06'. 
  5 
  

  

  

  Mean 
  71° 
  57'.4 
  

  

  

  Mean 
  72° 
  00'. 
  8 
  

  

  6 
  < 
  

  

  r 
  

  

  <U 
  o 
  1 
  

   o 
  ?. 
  "> 
  

  

  I 
  

  

  CO 
  © 
  | 
  

  

  "o 
  © 
  *1 
  

  

  l*g 
  1 
  

  

  W. 
  

   E. 
  

   E. 
  

  

  W. 
  

  

  w. 
  

  

  E. 
  

   E. 
  

   W. 
  

  

  W. 
  

   E. 
  

   W. 
  

   E. 
  

   W. 
  

   E. 
  

   W. 
  

   E. 
  

  

  71° 
  36' 
  

   72 
  15.5 
  

   72 
  05 
  

  

  71 
  56.5 
  

  

  72 
  01 
  

   72 
  15.5 
  

   72 
  13.5 
  

   71 
  51 
  

  

  6 
  < 
  

  

  r 
  

  

  r 
  b*sV| 
  

  

  o 
  £ 
  * 
  

  

  ^ 
  1 
  

   I 
  

  

  1 
  *{ 
  

  

  m 
  © 
  

  

  © 
  CO 
  ' 
  

  

  * 
  1 
  

  

  E. 
  

   W. 
  

   W. 
  

   E. 
  

   E. 
  

   W. 
  

   W. 
  

   E. 
  

  

  W. 
  

   E. 
  

   W. 
  

   E. 
  

   W. 
  

   E. 
  

   W. 
  

   E. 
  

  

  72°14'.5 
  

   72 
  01 
  .5 
  

  

  71 
  49 
  

  

  72 
  15 
  

  

  72 
  08.5 
  

   71 
  46 
  

  

  71 
  41 
  

  

  72 
  11 
  

  

  

  Mean 
  72° 
  01'. 
  7 
  

  

  

  Mean 
  72° 
  00 
  '.8 
  

  

  Mean 
  by 
  the 
  two 
  Needles 
  71° 
  59 
  '.6 
  

  

  Mean 
  by 
  the 
  two 
  Needles 
  72° 
  00'8 
  

  

  Dip 
  by 
  mean 
  of 
  both 
  Observations 
  72° 
  00'. 
  2 
  

  

  