Meteorological observations kept on board the ship Earl of Hardwicke, by Alexander Henning. Daily observations on the steamship Earl of Hardwicke, departing from Portsmouth, England and sailing for Calcutta [Kolkata], India. Columns give information on: day and date of observations; latitude and longitude [pp.12-13 entries for 8 and 12 February 1840 note 'anchored in Table Bay', 'Sailed from Table Bay']; barometer and sympiesometer at 9.30am, noon, 3.00pm, 4.30pm and 10.30pm; with air and sea temperature readings at 8.00am and general remarks on weather, including wind. Headed [p.1]: 'Meteorl. obsns. on board the Earl of Hardwicke HBMS by Captn. Henning. Commund. by Sir J. Herschel'. Signed [p.17] by Alexander Henning. 4 August 1839-7 April 1840