| Description | He has forwarded the observations requested by Herschel in his last letter by steamer from Halifax. He now sends a summary of observations from Montreal for the last few years, to afford some idea of the climate. It is the first such statement published for any continual period.
With a printed sheet headed: 'Meteorological summary of the weather at Montreal, Province of Canada...from Registers kept by J.S. M'Cord...for five years from 1836 [misprinted as 1336] to 1840, inclusive'. The sheet contains four tables:
Temperature, showing annual minimums, maximums, means and ranges, 1836-1840, with mean monthly temperatures, January-December for each year.
Weather, containing the annual numbers of days which were clear, cloudy, with rain, with snow, showers, and fog; with numbers of days observed, and average percentages of each condition.
Barometric pressure corrected and reduced to 32 degrees Fahrenheit, mean annual pressure and annual range; with annual rain in inches, and wind direction, with percentages. Snow gauge, showing inches of snow falling during the winters of 1830-1831, to 1839-1840.
The printed information notes that: 'These observations are all made with instruments by first (British) artists, duly compared with standards, and every precaution taken in their position to insure the most correct indications....'. Signed by J.S. M'Cord, 6 April 1841. The sheet is endorsed by Sir John Herschel: 'Communicated to the Physical Committee of the R.S. by Mr. McCord. J.F.W.H.'. |