6 DEPAETMENT OF AGRICULTURE BULS. 776-800. 



Department Bulletin No. 786. — Prevailing Plans and Practices Among 



Farmers' Mutual Fire Insurance Companies. Page. 



Introduction 1 



Location of companies, date and method of incorporation 2 



Membership, votes, and annual meeting 4 



Directors and officers 5 



Hazards and risks 6 



Business territory 7 



Plan of raising funds and frequency of assessments 8 



Liability of the insured 9 



Classification of property 9 



Method and cost of getting business 10 



Salaries of directors and officers 12 



Adjustment of losses 12 



Surplus and refunds 13 



Reinsurance 14 



Conclusion 14 



Publications relating to farmers' mutual fire insurance companies 16 



Department Bulletin No. 787. — Protection from the Locust Borer. 



Introduction 1 



Historical 2 



Observations ])y the writer 2 



Investigations and experiments 3 



Natnral growth in the vicinity of Falls Church, Va 3 



Plantations along the Pennsylvania Railroad 5 



Condition of tree necessary for borer attack 8 



How to recognize trees containing no borer defects 9 



Character of growth of uninfested stands 9 



Conditions under which locust can be grown 10 



Control 11 



A method of handling severely damaged plantations. 11 



Treatment of shade trees . : 11 



Literature cited 12 



Department Bulletin No. 788. — Moisture in Wheat and Mill Products. 



Introduction 1 



Moisture requirements of wheat for milling purposes 2 



Amount of moisture added to wheat during tempering 2 



Moisture content of wheat and various streams of mill stock 3 



Effect of tempering upon the moisture content of wheat 6 



Distribution of moisture in the tempered wheat kernel 7 



Loss of moisture during grinding 8 



Moisture content of different flour streams 9 



Moisture content and yield of mill products 10 



Gains and losses in weight effected by change in moisture content 



incident to tempering and milling 11 



Summary of results 12 



Department Bulletin No. 789. — Notes on Grain Pressures in Storage 



Bins. 



Introduction 1 



Janssen's formula 1 



Pressure factors for wheat in round or other regular concrete bins 2 



Explanation of Plate 1 3 



Determination of unit pressures in rectangular or other irregular bins 5 



Determination of unit pressures for various grains in bins of different 



materia's 5 



Horizontal reinfoi'cing for cylindrical concrete bins 6 



Horizontal reinforcing for straight walls of concrete bins 7 



Determination of vertical and lateral pressures in grain bins with horizontal 



reinforcing for cylindrical concrete tanks by means of Plate II 10 



Appendix 14 



Selected list of publications on the pressure of stored grain 15 



