| Description | Graphs showing monthly and mean hourly curves of the declination, horizontal force, and vertical force magnetometers at Madras [Chennai], using Gottingen mean time. With monthly curves of meteorological instruments: maximum and minimum of thermometers, dry and wet bulb thermometers, terrestrial radiation and barometer corrected; and mean hourly curves, showing wet and dry bulb thermometers, dew point, and corrected barometer readings.
Each sheet signed 'S.O.E. Ludlow'. There are no curve sheets for February 1842. |