Observations On Terrestrial Magnetism And On the Deviations of the Compasses of
Observations On Terrestrial Magnetism And On the Deviations of the Compasses of
William Harkness
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77 88. 3 82. 0 7T O Coefficient of torsion v = 8. 12 div. Temperature .... 60. 7 Time of one vibration . 7'. 2I2 Temperature .... 60. O Time of one vibration . 6". 765 Gosport, October 28, 1865. St. Thomas, November 13, 1865. No. Time P. M. No. Time P. M. Time of 150 vibrations. No. Time P. M. No. Time P. M. Time of 150 vibrations. 10 " 20 3 40 5 3 h 43 m 6'. 4 3 44 '4-4 3 45 22. 0 3 46 29. 6 3 47 37-2 3 48 45- 6 Extreme sea At beginn At end 150 1 60 170 180 190 200 le readin inrr 4>> o m 3". 6... 4 I ii. 6 4 2 J9-5 4 3 27. 2 4 4 34-9 4 5 42-8 i6 m 57. 2 16 57. 2 16 57-5 16 57. 6 1 57-7 16 57. 2 o IO 20 30 4 5 2 h 23 6 s . 2 2 24 3. 2 2 24 59. 8 2 25 56. 9 2 26 2 27 49. 0 Extreme sea At beginn At end '5 1 60 170 1 80 190 200 . E readir incf 2 h 37 i8'. 6 2 38 15-4 2 39 12. 2 2 40 8. 4 2 4i 5-7 2 42 2. 8 14 I2". 4 14 12. 2 14 12. 4 14 11. 5 H 14 13. 8 Mean . . . gs, . - 60. 16 57. 40 2 88. 8 1 85. 2 Mean . . . g s > fo 14 12. 46 2 98. 0 $ 90. 2 72. f
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