DEPARTMENT OF AGRICULTURE BULS. 826-850. 



Department Bulletin No. 845.— Production of Lumber, Lath, and 

 Shingles in 1918— Continued. 

 Lumber production by kinds of wood — Continued. 



Western yellow pine 



Spruce ,. - 



Maple 



Gum 



Cypress 



Redwood 



Chestnut 



Birch 



Larch " 



Beech 



Yellow poplar 



Cedar 



Tupelo 



White fir 



Basswood 



Elm 



Cottonwood 



Ash...... 



Sugar pine 



Hickory 



Walnut 



Balsam fir 



Sycamore 



Lodgepole pine 



Minor species 



Production of lath 



Production of shingles 



Lumber values 



Detailed summary 



Department Bulletin No. 846. — Examination of Frozen Egg Products 

 and Interpretation of Results: 



Object of investigation 



Plan of investigation 



Preliminary investigation 



Progress of investigation 



Preparation of samples 



Examination of samples 



Results of examination of samples 



Discussion of results of examination 



Interpretation of results of investigation ." 



Methods of examination of samples 



Summary 



Department Bulletin No. 847. — Roundheaded Apple-tree Borer: Its 

 Life History and Control: 



Introduction 



History 



Distribution 



Food plants 



Distribution as affected by native host plants 



Character of injury 



Methods used in securing breeding material and rearing the insects 



Cages used for rearing and observing borers 



The egg and oviposition 



The larva 



The pupa 



The adult 



Seasonal phenomena of the host trees as an index to the time of develop- 

 mental changes of the insect 



Natural enemies 



Methods of control 



Summary 



Literature cited 



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