6 DEPARTMENT OF AGRICULTURE BULS. 1326-1350 



Pago 



Department Bulletin No. 1335. — Commercial Dehydration of 

 Fruits and Vegetables — Continued. 



Pretreatment 8 



Blanching or processing 9 



Sulphuring 10 



Drying 10 



Equipment 10 



Heat 13 



Air 15 



Moisture in the air 15 



Relation of drying conditions to drying rate and quality of 



product 



Recirculation 



Engineering calculations for designing a drier 



End point of dehydration 



Curing 



Insects attacking dried fruits 



Preventive measures 



Remedial measures 



Packing and storing 



Detailed directions for drying 



Fruits 



Vegetables 



Bibliography 



Dehydration of fruits and vegetables 



Control of insect pests 



Department Bulletin No. 1336. — Biological Studies op the Green 

 Clover Worm: 



Introduction 



Systematic history 



Synonymy ■ 



Geographical distribution 



Food plants 



Description of stages 



Life history and habits 



Seasonal history 



Natural enemies 



Literature cited 



Department Bulletin No. 1337. — Work op the Northern Great 

 Plains Field Station in 1923: 



Introduction 



Arboricultural investigations 



Cooperative shelter-belt demonstrations 



Experimental tree plantings 



Horticultural investigations 



Pomological investigations 



Olericultural investigations 



Ornamental horticulture 



Agronomic investigations 



Rotation and tillage experiments 



Cooperative cereal and forage-crop investigations 



Conclusions from agronomic investigations 



Grazing investigations 



Department Bulletin No. 1338. — -The Family Living prom the 

 Farm. Data prom 30 Farming Localities in 21 States for the 

 Years 1918 to 1922: 



Significance of family living from the farm 



Localities studied 



The family living from the farm 



Years of prosperity and depression 



Cost of living of farm families 



The farm business 



Size of farm 



Size Of family 



