Wandle Temperatures. 



817 



1889. 



The mean shade temperature of the air, i. e., the weekly mean 

 of the max. and min. for this period, was lowest on Jan. 6th, 

 being 30-5° F. ; the highest being 64-1° on Sept. 15th, showing 

 a difference of 33-6°. But the lowest observed shade temperature 

 I find was on Dec. 8th, being 25'3°, or 6'7° below the freezing- 

 point ; and the highest shade temperature, on June 30th, being 

 77-3°, or a difference of 52°. 



Mr. Bayard has done good service in bringing these dis- 

 crepancies to light, and placing them on record in the careful 

 way he has, so that they may be available for future investi- 

 gators. 



