4 DEPARTMENT OF AGRICULTURE BULS. 176-200. 



Department Bulletin 180. — -Soil ERoqi^jN in the South — Continued. 'Page. 



The prevention of erosion Iq 



Reclamation of eroded land 14 



Eroded sections in the South , 17 



Geology of Appalachian and Piedmont regions 18 



Soils 18 



Damage to flood plains 20 



Agricultural problems 21 



Economic losses • 22 



Summary 25 



Department Bulletin 181. — A Report ok the Method and Cost of Re- 

 claiming the Overflowed Lands along the Big Black River, Missis- 

 sippi: 



Introduction 



General description of the district 



Present drainage conditions 



The survey 



The drainage problem 



Run-off 



Drainage plans considered 



Proposed plans 



Maintenance 



Summary 



Appendix 



Department Bulletin 182. — Agricultural Alcohol: 



Study of Its Manufacture in Germany: 



Review of the problem of manufacture 



Report of visits to agricultural distilleries , 



Department Bulletin 183. — Morphology of the Barley Grain with 

 Reference to Its Enzym-secreting Areas: 



Introduction 



Sti'ucture of the barley grain 



Development of the barley grain 



Germination 



Conversion of the endosperm 



Resume of the conclusions of other investigations 



Source of diastatic ferments 



Location of diastase secretion 



Source of cytatic and proteolytic ferments 



Function of the aleurone layer 



Greater diastatic power of small-berried and of high-nitrogen barleys 



Efficiency of conversion 



American barleys 



Modifications possible by culture 



Foreign barleys 



Summary 



Department Bulletin 184. — The Huisache Girdler: 



Introductory 



Description 



Distribution and history 



Food plants 



Life history 



Longevity 



Natural enemies 



Method of control ^. 



Department Bulletin 185. — Bird Migration: 



Introduction 



Causes of migration 



Relation of migration to weather 



Day and night migrants 



Distance of migration 



Routes of migration 



Direct and circuitous migration routes 



Eccentric migration routes 



Wide and narrow migration routes 



