*o 



Dr, C. Smallwood^s contrihutiont to 



which fell in 45 minutes. The Riviere des Prairies, a branch 

 of the Ottawa, rose .very high during May, and a like rise has 

 not been witnessed since 1848. 



The following table shows the monthly amount and the duration of fall : 



Amount. Time 



Amount- Time. 



January. . 

 February, 

 March . . 

 April . . . . 

 May .... 

 June . . . . 



Inches. 



0.100 



0.761 



1.Y56 



2.921 



8.642 



4.868 



h. m. 



4.10'july 



1*7.251 August 



52.35|September. 

 60.42|October... 

 49.32jNovember. 

 56. 18 December. 



Inches 

 10.188 

 1.950 

 4.816 

 5.370 

 1.023 

 1.306 



h. m. 

 79.49 

 12.31 

 66.50 

 69.30 

 32.52 

 31.00 



July shows a very large amount of rain but is not the greatest 

 amount on record here for July, but exceeds by 4.456 inches the 

 amount of last July (1860), but is less by 2.026 inches the amount 

 of rain which fell in July 1859, which was the most rainy July 

 on record here ; this was accompanied by a very heavy storm and 

 showed an amount of rain equal to 6.374 inches, and the rivers in 

 this neighbourhood rose at this time nearly 2 feet ; the rain storm 

 lasted 45 hours and 40 minutes. 



Thunder and lightning occurred on 16 days, the yearly mean 

 for a series of years is 14 ; last year (1860) thunder only occurred 

 on 11 days; there were 43 cloudless days only during the year 

 1861, the average for a series of years being 57. The prevailing 

 clouds were Cumuli Stratus and a rather larger amount of Cirri 

 Stratus, giviog rise to haloes; and there were but 123 nights suit- 

 able for astronomical purposes ; this is less by 20 than the number 

 of nights in the year 1860. Snow fell on 45 days amounting to 

 99.53 inches; it was snowing 365 hours and 54 minutes, which is 

 less by 1.77 inches the average amount for a series of years, but 

 is 38.26 inches less than the amount of snow which fell in 1860, 

 and is 40.57 inches less than the amount which fell in 1859. 

 The last snow of the winter 1860-1 fell on the l7th of April, and 

 the Ist snow of the autumn fell on the 24th October. "Winter 

 did not fairly set in until the 23rd of December. 



Evaporation. — The amount of evaporation from the surface of 

 water during the 6 months which are recorded is 16.90 inches, 

 which is nearly 1 inch less than the mean amount ; the amount of 

 evaporation also from the surface of ice was somewhat less than 

 the average. 



