LIV. 



England. — Greenwich. Lat. 51° 29' N. Long. 0° 0'. 



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

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



Degrees of Fahrenheit. 



£ 



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



62 



