34 



OPEN AIR GRAPE CULTURE. 



hj plentiful addition of lime and any black mold or 

 charcoal. 



Maximum Temperatures of the various Eartlis 

 Exposed to the Sun. By Schuhler. 



Table of detention of Heat. By Becquerel. 



From these tables it will be seen that black mold 

 receives or absorbs heat most rapidly, but parts with 

 it in the shortest space of time also, and that for 



