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DEPARTMENT OF AGRICULTURE BULS. 901-925. 



Department Bulletin No. 911. — Lite History of the Grape-berry Moth 

 in Northern Ohio: 



Method of conducting rearing work 



Weather conditions in 1916, 1917, and 1918 



Seasonal-history studies, 1916 



Seasonal-history studies, 1917 



Seasonal-history studies, 1918 



Miscellaneous records 



Summary 



Department Bulletin No. 912. — Hail Insurance on Farm Crops in the 

 United States: 



Introduction : 



Origin and development 



Territorial distribution 



Cost of hail insurance 



Characteristics of the hail insurance contract 



Special problems in hail insurance 



Department Bulletin No. 913. — The Western Farmer's Water Right: 



What a water right is 



General characteristics of water rights 



Acquirement of rights 



Evidences of title to rights to water from streams 



Rights to underground waters 



Rights to water from canals 



Distribution of water 



Department Bulletin No. 914. — The Red-banded Leaf-roller: 



Introduction 



Descriptive 



Distribution 



Injuries and occurrences 



Biologic notes 



History of the species 



Food plants 



Natural enemies 



Control 



Summary 



Literature cited 



Department Bulletin No. 915. — Toxicity of Barium Carbonate to P^ats: 



Purpose of investigation 



Previous investigations 



Experimental procedure 



Results of experimental work 



Minimum efficient concentration of barium carbonate 



Results of experimental work on other baiium compounds 



Toxicity of barium carbonate to animals other than rats 



Conclusions 



Bibliography 



Department Bulletin No. 916.— Freezing Injury to Potatoes When 

 Undercooled: 



Scope of the investigations 



Physiology of the freezing process 



Plan of the work 



Inoculation of undercooled potatoes 



Summary 



Literature cited 



Department Bulletin No. 917. — Far" 

 in Three Sugar-beet Districts of 



The districts studied 



Method used i n collecting data . . 



Soil types of the region 



Climatic conditions 



Seasonal distribution of labor. . . 

 Farm practice 



Practice in Growing Field Crops 

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