Diagram showing the 1M[EAN HIGHEST DAY TEMPERATURE, the MEAN LOWEST 

 NIGHT TEMPERATURE, and the MEAN TEMPBRATUilE, for the Year; 

 together with the same for each Month in the 51 years, 1850 to 1900 inclusive, 

 at the ROYAL INSTITUTION OF CORNWALL, Truro. 



Diagi^ain CI 



