CONTENTS, 



Page. 



Instructions to field parties 7 



Fiscal regulations „ 7 



Authorization to travel 8 



Transportation 8 



Freight and express 8 



Allowances for field parties 8 



Subvouchers for team hire 9 



Signatures to subvouchers 10 



Laundry 10 



Telegrams 11 



Location of headquarters while in field 11 



Accidents to parties 12 



Six-months' reports 18 



Instructions for mapping soils and alkali 18 



Organization of field party 18 



Prosecution of field work 14 



Establishing soil types 14 



Correlation of soil types lo 



Scheme of soil classification 19 



Outfit for work 22 



Odometer 22 



Plane-table traversing 24 



Samples for laboratory examination 25 



Correspondence and weekly report 26 



Field and ofiice maps 26 



Directions for mapping alkali soils .. '. 26 



Reduction of resistances to a temperature of 60° F 32 



Directions for estimating soluble salts in soils 36 



Construction of alkali maps 37 



Determination of salts in water 38 



Form of soil survey report „ . 41 



Outline of soil survey report 41 



5 



