116 



THE CANADIAN NATURALIST. 



[March 



Temperature of the Air F ° . — The highest reading of 

 the Thermometer during the year was on the 13th July and was 

 98-7; the lowest reading was on the 11th of February and was 

 22-4 degrees (below zero.) The mean temperature for the year 

 was 42-45. This agrees exactly with the observations on the 

 mean annual temperature made by the late Hon. Mr. Justice 

 McCord, also with my own, but it is nearly 2 ° degrees lower than 

 the mean annual temperature furnished from observations of the 

 late Dr. A. Hall. 



The yearly range or climatic difference for the year was 121-1 

 degrees. 



The extreme heat of July was marked by a mean temperature 

 of 76 ° which exceed by 5 ° degrees the Isothermal for Montreal, 

 deduced from observations continued during a long series of years, 

 and there were during the month ^(oo(its^i«c^ hot terms, including 

 the 2nd, 3rd, 4th, and 5th days, when the mean temperature was 

 82-3, 84-7, 84-4, and 83-1 respectively. The Thermometer never 

 indicated less than 72-7 during the 24 hours. 



The seco?ifZ hot term includes the 11th, 12th, 13th, 14th, 15th, 

 and 16th days; their respective means being 84-0, 87-6, 87-1, 

 87-9 and 85-5, and the temperature during this term was never 

 below 71.4 during the 24 hours. 



Below is a table shewing the months' highest and lowest read- 

 ings, also the monthly means, together with the amount of rain 

 and snow in each month : — 



Months. 



Meau Tem- 

 perature 

 in F. = 



Highest 

 Tempera- 

 ture. 



Lowest 

 Tempera- 

 ture. 



Rain, 

 depth in 

 inches. 



Snow, 

 depth in 

 inches. 



January.. 

 February' . 



March 



April .... 



May 



June 



July .... 

 August- . . 

 September 

 October. . . 

 Noveuibor. 

 December. 



10 = 80 

 9 = 49 



;n®90 



38 = 95 

 53 = 89 

 66 = 40 

 76 = 00 

 69 = 94 

 57 = 94 

 44 = 82 

 33 = 30 

 16 = 00 



37 = 2 

 33 = 1 



67 = 



68 = 2 

 82 = 3 

 95 = 7 

 98 = 7 

 87 = 9 

 80 = 7 



69 = 1 

 53 = 

 32 = 1 



1 429 

 0.241 

 3.462 

 0.486 

 2.124 

 2.362 

 3.494 

 0.794 

 4.473 



12.63 



22.20 



5.34 



14.93 



4.92 



17.28 

 27.96 



