| Description | Hourly and half-hourly meteorological observations taken from 6.00am on 9 April to 9.00pm on 10 April 1840. Columns for day and hour, barometer readings and difference, thermometer, hygrometer (thermometer, dew point and difference), wind direction and strength, and general weather remarks. Rain gauge readings below the main table.
Headed [p.1]: 'Mauritius Observatory. Meteorological observations, taken on the 9th and 10th. April 1840.', concluding 'John Morton, In charge of the Observatory'. |