OPEN AIR GRAPE CULTURE. 



by plentiful addition of lime and any black mold or 

 charcoal. 



Jlfaximum Temperatures of the various Earths 

 Exposed to the j$un. By Schublcr. 



Table of Retention of Heat. By Becgiierel. 



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 



