638 LXVII. 



Russia. — St. Petersburg, Continued. 



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. — Dove. 



Degrees of Reaumur. 



F 



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



74 



