GONTEl^TS, 



Department Bulletin No. 1107. — The I/Ead-cable Borer or "Short- 

 circuit Beetle " IN California — Continued. Page. 



Summary and conclusione 41 



Literature cited 42 



Insects attacking or penetrating metals 42 



The California lead-cable borer (ScoMcia declivis) 46 



Appendix 49 



Taxonomy and morphology of the larval stages of Scobicia declivis 



Lee. — Adam G. Boving 49 



Description of mature adult of Scobicia declivis — R. D. Hartman. 54 



Department Bulletin No. 1108. — Tables for the Microscopic Identifi- 

 cation OP Inorganic Salts: 



Introduction 1 



Petrographic methods 2 



Explanation of symbols 4 



Optical properties 5 



Tables 10 



Department Bulletin No. 1109. — Sales Methods and Policies of a 

 Growers' National Marketing Agency: 



Introduction 1 



The evolution of marketing methods — 



Early cooperative selling associations 5 



The rise of national cooperation 7 



The American cranberry exchange 9 



Improvements resulting from cooperation — 



Grading 12 



Pooling 13 



Advertising 14 



Cooperation with the trade 19 



Coordinating demand with supply 20 



Impracticability of price control 22 



The expense of marketing cranberries- — 



Local associations 27 



The central association 28 



Advertising 29 



Transportation 29 



.Jobbers (wholesalers) 31 



Other wholesalers - 31 



Retail margins and prices 32 



All marketing exy^enses 34 



Department Bulletin No. 1110. — Tpie Farmer's Short-box Measuring 

 Flume: 



Description of flume 1 



Method of calibration 2 



Derivation of discharge formulas 5 



Free-flow discharge table 6 



Submerged-flow discharge diagrams 9 



Special tests 12 



Summary 13 



Department Bulletin No. 1111.- — One- variety Cotton Communities: 



Pure cottonseed a fundamental requirement 1 



Disadvantages of mixed-variety production 3 



Superior varieties not utilized 6 



Distribution of nev/ varieties ineffective 7 



Deterioration through public gins 11 



Gin-unit communities 13 



Too many cotton varieties 15 



Renaming ^-arietie^ of cotton 17 



Community pure seed the best 19 



Different kinds of organization 21 



Progress in organized communities 24 



Classing cotton in the field 26 



Relation of community production to diversified farming 28 



Interest in community development 30 



Community utilization of varieties - 34 



Pima cotton communities 36 



