THE EXPERIMENT STATION. 



105 



RECORD OF MAXIMUM BLACK BULB AND MINIMUM THERMOMETERS IN OPEN AIR 

 AT GRAYLING, APRIL TO OCTOBER INCLUSIVE, 1889. 



V. — SUNSHINE RECORD. 



Eecords of the sunshine have been kept, Pickering's Sunshine Recorders 

 being used for this purpose. The value of such records as furnishing one 

 of the physical data for studying the conditions of agriculture in a given 



