CONTENTS. 



Department Bulletin Xo. 412. — The Normal Day's Work of Farm Im- 

 plements, ^Y0RKMEN, AND CrEWS IN "VYeSTERN NeW YoRK: 



A normal day's Tvork 



Soui-ce of data 



Local conditions 



Plowing 



Harrowing 



The land roller 



Grain crop operations 



Threshing wheat 



Handling maniu'e 



Operations on the corn crop 



Operations on the bean crop 



Ha^-ing operations ". . . 



Operations on the cabbage crop < 



Operations on the fruit crops 



Department Bulletin No. 413. — Influence of Age on the Value of Dairy 

 Cows AND Farm Work Horses: 

 Influence of age on value of cows -. . 



Holstein 



Guernseys 



Jerseys. 



Ap'shires 



General discussion of preceding tables > 



Influence of age on value of work horses 



Department Bulletin No. 414. — Convict Labor for Road Work: 



Introduction 



Systems of con\dct labor 



Road work for con-victs 



Efiiciency and economy of convict labor. .-. 



Management and operation .■ 



Records and cost accounts 



Discipline and methods of control 



Camp location 



Water supplies 



Camp sanitation 



Health conditions and care of sick and injured .■ 



Quarters and structures 



Clothing, camp supplies, and equipment 



Rations for convicts at road camps : 



Bibliography 



Appendix 



Department Bulletin No. 415. — The Recovery of Potash from Alunite: 



Introduction 



Composition and properties of alunite 



Geological occurrence and origin ; 



Location, extent, and accessibility of the Utah alunites 



The production of alum from alunite 



The production of potasli from alunite 



Temperature of ignition and its effect on the suljsequent leaching of alu- 

 nite 



Influence of fine grinding on the extraction of potash from alunite 



Economic considerations 



Summary 



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