CONTENTS. 7 



Department Bttlletin No. 391. — Accttracy in Commercial Grading op 



Opened Eggs — Continued. Page. 



Descriptions and bacterial counts of eggs graded out of the shell 14 



Effect of contaminated eggs upon composite products 18 



Eggs rejected during grading 21 



Summary 25 



Department Bulletin No. 392. — Lessons on Tomatoes, for Rural 

 Schools. 



Introduction 1 



History and importance 2 



Varieties 4 



Harvesting 5 



Judging 6 



Place of tomatoes in the rotation 9 



Hotbed and cold frame 9 



Soil — Kind, preparation, fertilization 11 



Hardening off plants: Preparing land and transplanting 12 



Training, pruning and cultivating 13 



Pests — Diseases and insects 14 



Club organization 16 



Community exhibits 17 



Department Bulletin No. 393. — Economic Surveys or County High- 

 way Improvement. 



Introduction 1 



Comparative analysis of economic effects of road improvement 2 



Spotsylvania County, Va 10 



Dinwiddie County, Va 28 



Lee County, Va 36 



Wise County, Va 44 



Franklin County, N. Y 52 



Dallas County, Ala 62 



Lauderdale County, Miss 68 



Manatee County, Fla 79 



Department Bulletin No. 394. — ^A Survey of Typical Cooperative Stores 

 IN THE United States. 



Purpose, scope, and method of the survey 1 



Origin of the stores 3 



General organization 6 



Operating organization 8 



Finance 9 



Credit 12 



Purchasing 13 



Selling 14 



Accounting, reports, and auditing 16 



Equipment : 20 



The balance sheet 20 



Operating expenses 21 



Observations and conclusions 26 



Appendix 30 



Department Bulletin No. 395. — Peach Scab and Its Control. 



Introduction 1 



The disease 3 



The causal organism 11 



Life history of the causal organism in relation to pathogenesis 32 



Control measures 46 



Summary 61 



Literature cited 64 



