| Description | Hourly meteorological observations taken from 6.00am on 22 June to 6.00am on 23 June 1840 [June solstice]. Columns for day and hour, barometer readings and difference, thermometer in fahrentheit, thermometer in shade in fahrenheit, thermometer in Sun in centigrade, hygrometer (thermometer, dew point and difference), extremes of heat and cold, rain gauge, wind direction and strength, and general weather remarks.
Headed [p.1]: 'Meteorological Observations taken at the Mauritius Observatory on the 22d & 23rd June 1840'. Signed 'John Morton. In charge of the observatory'. Various minor inscriptions [p.2] including: 'Hourly Metl. Obsns. Mauritius June 1840, Recd. from Mr. Morton of Port Louis Observatory Feb 1841 J.F.W.H. [John Frederick William Herschel]. For the meteorol. collection of the Royal Society'. |