VIII. 585 



North America. — Toronto. Lat. 43° 40' N. Long. 79° 21' W. Greenw. 



Corrections to be applied to the Means of the Hours of Observation to obtain the true 

 Mean Temperatures of the respective Days, Months, and of the Year. — Lefroy. 



Degrees of Fahrenheit. 



F 



The numbers without sign must be added ; those with the sign — must be subtracted. 



21 



