| Description | Twice daily observations of magnetic dip made on nine days during March 1842. Columns for date and time, thermometer, result from 1st arbitrary azimuth, result in the meridian, result from 2nd arbitrary azimuth, and mean of the three results.
Headed: 'Observation of the Dip of the Needle taken at Madras during the month of March 1842. Needle Robinson's New No.2'. Signed [p.1]: 'S.O.E. Ludlow Supt' and dated 'Madras 23 April 1842'. |