Pike, PROCEEDINGS OF THE CANADIAN INSTITUTE. 
( 
| ax. | Fes. | Mar.| Apr. | May. | June, Jovy,| Ave. Sepr. | Oct. 
Nov. | Dec. 
| 
Mean .... | 26°2) 27°44] 32°5| 41:7 aa 6771 ae 72:9) 66:3| 564] 38-7] 2971 
| 
Mean max. et 64:3] 54°5| 65:0] 85°3| 91°0) 95:0] 9175) 90°7| 72°0| 62:0) 49°7 
| 
Mean min. 67} 7:0} 18:7] 187] 40°3| 51°3| 61:5] 59-7 49°5 375 20) 90 
The mean temperature of the year is 49°:25: did the record 
extend over the eight years which have been used for the averages 
of Toronto, Hamilton and Windsor, it would probably appear a 
smal] fraction of a degree lower. 
The coldest January averaged 16°.5, or 0°.7 higher than the same 
month at Windsor, while the warmest, (34°.8) was 1°.4 colder. The 
absolutely lowest temperature (—12°) occurred when the west end of 
the lake was covered with ice and was 5°.4 lower than at Windsor. 
The occurrence of lower temperatures than at Windsor during the 
same severe season suggests that the effect of a neighboring area of 
ice in extremely cold weather, is more favourable to the development 
of cold than is the vicinity of an unbroken land area, an explanation 
which may find additional illustration along the eastern side of the 
Georgian Bay. In mild winters the low extremes are higher at 
Pelee than at Windsor. In January 1880 the minimum at that town 
was 19°, while at Pelee it was only 25°. In the other months of the 
same winter the difference in favour of- Pelee was from 4°.5 to 10°.5. 
The absolutely highest temperatures in the winter months were : 
Dec. 57°, Jan. 55°, Feb. 63°, March 60°. The extraordinary small- 
ness of the mean daily range in winter is shown by a comparison 
between the averages of the 7 a.m. and the 2 p.m. readings. The 
average difference in Dec. is only 2°.2, in Jan. 3°.3, Feb. 6°.4, and 
March 5°.4.. In December 1881 the average temperature was 34°.7, 
but the 2 p.m. reading was only 36°.1, and the 7 a.m. 34°.5, a 
total range of only 1°.6, between hours which represent, at this season 
hours of observation only, but a careful consideration of the facts as to cloudiness, direction 
of wind, &c., at the times of their occurrence, and for some time before and after, leads to the 
conclusion that in many instances they represent within a fraction of a degree the true max. 
or min., as the case may be, and that in few instances can the highest or lowest temperatures 
have differed more than one or two degrees from these quantities as taken from hours of obser- 
vation alone. Where the mean teniperature of the month is not derived from the original records 
no attempt has been made at supplying maximum and minimum, or averages other than for 
mean temperature. The mean maximum and mean minimum of November is consequently 
derived from but one month, that of October from only two, those of January, February, 
April and May from three, and the remaining months of the year from four. 
