CONTENTS 7 



Page 



Department Bulletin No. 1314. — A Bibliography Relating to Soil 

 Alkalies. — Compiled With Special Reference to the Delete- 

 rious Action op Soil Alkalies, and Various Other Chemical 

 Agents on Cement and Concrete — ContinuEd. 



V. Waterproofing of concrete 33 



Various methods and the effects of their use 33 



VI. Alkali-resistant concrete 37 



Special ingredients and methods for producing resistance to 



alkali and sea water; incidental effects of same 37 



Department Bulletin No. 1315. — Dry Farming in Southeastern 

 Wyoming: 



Introduction 1 



Soil 2 



Climate ' 2 



Experimental methods 4 



Results with spring wheat 5 



Results with winter wheat 6 



Results with oats 8 



ResuJts with barley 10 



Results with flax 11 



Results with corn 12 



General discussion of rotations 14 



Crop resistance to drought, disease, and storm 15 



Dates and rates of seeding 16 



Summary 18 



Department Bulletin No. 1316. — Some Effects of Sodium Arsenite 

 When Used to Kill the Common Barberry: 



Introduction 1 



Historical review 2 



Arsenic as a weed killer 2 



Toxic and stimulating effects on plants 3 



Toxic effects on animals 5 



Method used in arsenic analysis 6 



Description of apparatus 6 



Preparation of sample 6 



Procedure of analysis 7 



Experimental results 7 



Killing concentrations of arsenical solutions 7 



Absorption of arsenic by plant tissues 10 



Rate of leaching of sodium arsenite from soils 12 



Sodium arsenite and farm animals 13 



Discussion 14 



Summary 15 



Literature cited 16 



Department Bulletin No. 1317. — Retail Marketing of Meats. — 

 Agencies of Distribution, Methods of Merchandising, and 

 Operating Expenses and Profits: 



Agencies of distribution and methods of merchandising 2 



Canvass of representative districts 2 



Development of the retail meat business 4 



Channels for distributing meat to retailers 5 



Methods, practices, and conditions in the trade 8 



Types of stores 8 



Recent growth of chain-store systems 10 



Classes of service rendered by stores 14 



Volume of sales of stores by types and classes 17 



Relation of numbers of stores to population 20 



Previous occupation and experience of dealers 23 



Nationalities and races of dealers 24 



(Jrades and r-lnsxe of beef handled _ __ . _ 28 



Relative- demand for carcasses and sides and for cuts of 



beef 32 



Methods and extent of advertising 32 



Sanitary conditions and regulations - 35 



