6 DEPARTMENT OF AGRICULTURE BULS.' 801-825, 



Ddpartment Bulletin No. 810. — European Foul Brood — Continued: Pagc. 



•Resistance of Bacillus pluton to putrefaction 22 



Viability of Bacillus pluton in honey 23 



Viability of Bacillus pluton in pollen 24 



Resistance of Bacillus pluton to carbolic acid 24 



Effect of drugs on European foul brood 26 



Transmission of European foul brood 26 



Diagnosis 28 



Prognosis 31 



Summary and conclusions 31» 



Literature cited " 34 



Explanation of plates 37 



Department Bulletin No. 811. — A System op Bookkeeping for Grain 

 Elevators : 



Introduction 1 



Types of elevator accoimting systems 2 



Description of the system and directions for its operation 3 



Grain receiving and shipping records 3 



Other grain records . 6 



Cash journal and purchase and sales record 6 



Reports: Grain, merchandise, and manager's 10 



Ledgers 11 



Classification of general ledger accounts 12 



Trial balance 31 



Closing the books 31 



Balance sheet - 35 



Income and expenses statement 37 



Cost analysis' 40 



Balancing cash with bank 40 



Supply accounts settled with grain 41 



Conclusions 41 



Forms and illustrated entries 43 



Department Bulletin No. 812. — The Clover and Alfalfa Seed Chalcis- 

 fly: 



Introduction 1 



History and synonymy 2 



Distribution 3 



Character of attack 3 



Food plants 4 



Economic importance 4 



Common names 6 



Means of dispersion 6 



Life history 7 



Seasonal history 8 



Relative infestation throughout the season 13 



Parthenogenesis '. 14 



Control methods 14 



Hymenopterous parasites 17 



Predacious midge 19 



Literature cited 20 



Department Bulletin No. 813. — Citrus-fruit Improvement: A Study 

 OF Bud Variation in the Eureka Lemon: 



Importance of the lemon industry 1 



History of the Eureka variety 3 



Variability within the variety 3 



Objects of the investigations 6 



Plan of the investigations 7 



Methods of keeping performance records 8 



Tree numbers 8 



Picking 9 



Assorting 9 



Recording the data 11 



