VOLUME IV 



Nos. 5 and 6 



THE MONTHLY BULLETIN 



U. ii-X ^ 



o o 



Leaves of alfalfa that have been bleached 

 by sulphur dioxide gas liberated in the smelt- 

 ing of ores. (Photo by Geo. P. Weldon.) 



OF 



STATE COMMISSION OF HORTICULTURE 



SACRAMENTO. CALIFORNIA 



MAY and JUNE, 1915 



