4 DEPARTMENT OF AGRICULTURE BULS. 1101-1125. 



Department Bulletin No. 1104. — Internal Brownino of the Yellow 



Newtown Apple: Page. 



History of the investigations 1 



Description of internal browning 4 



Experimental work 6 



• Relation of internal bro-\vning to storage conditions 8 



Relation of internal browning to orchard conditions 12 



Relation of internal browning to soil fertility and fertilizers 14 



Relation of internal browning to the individual tree 16 



Defoliation and girdling experiments 17 



Resume of factors conducive to internal browning 22 



Conclusions 23 



Summary 23 



Department Bulletin No. 1105. — Natural Reproduction op Western 

 Yellow Pine in the Southwest: 



Purpose of studv 1 



Review of previous investigations 2 



Recent developments in the study 4 



Factors influencing reproduction 9 



Seed supply 9 



Climate 22 



Soil 29 



Herbaceous vegetation 38 



Cutting 56 



Brush disposal 92 



Grazing 115 



Miscellaneous enemies 133 



Summary 135 



Literature cited 142 



Department Bulletin No. 1106. — -Legal Phases op Cooperative As- 

 sociations: 



Foreword 1 



Incorporated associations or corporations 2 



Contracts 22 



Promissory notes 29 



Agency 31 



Monopolies — restraint of trade 35 



Federal Trade Commission 46 



Specific performance — injunctions 48 



Income taxes 52 



Unincorporated associations ■. 54 



Appendix 61 



Department Bulletin No. 1107. — The LsAD-cAfeLE Borer or "Short- 

 circuit Beetle" in California: 



Review of injury to metals by boring insects throughout the world 1 



Injury to lead fuses by insects 3 



Damage to lead sheathing of aerial cables by Scobicia decUvis Lee 4 



Damage by the California lead-cable borer (Scobicia declivis) to trees and 



forest products 9 



Biology of Scobicia decUvis 11 



Distribution 11 



Food plants 12 



Associated insects 12 



Predatory and parasitic enemies 12 



Life cycle 13 



Seasonal history 14 



Description and habits 14 



T'ontrol experiments 20 



Tests at Falls Church, Va., 1918 and 1919 20 



Results of experiments at Falls Church, Va., 1918 and 1919 21 



Tests at Los Gatos, Calif., 1918-1920 21 



Results of experiments at Los Gatos, Calif., 1918-1920 23 



Experiments in California during the season of 1921 30 



Results of experiments in California in 1921 30 



Results of experiments in California in 1922 39 



The metal-penetrating ability of the insects associated with the cable ■ 



borer 40 



