| Description | Daily readings of external temperature, taken morning and evening, with notes on snowfall [in inches], rain, wind direction and weather [cloud-cover]. With general weather diary observations.
Commencing 'Register of the Weather kept at Trois-Rivières'. In pencil: 'by Mr. Barr'. A postscript [p.149] reads: 'The above Observations were taken by Fahrenheit's Thermometer, which was placed in a Garden. The degrees of Cold were marked down at 6 O'Clock in the morning, & at 9 O'Clock in the Evening. The letters a & b, denote the Mercury to be above or below 0'.
Previous meteorological journals kept at Montreal by William Barr, for some months of the years 1776-1777 and 1778-1779, were published in the Philosophical Transactions. Barr was styled 'Purveyor to his Majesty's hospitals in Canada'.
Tables appear on recto pages only. |