8 DEPAKTMENT OF AGRICULTURE BULS. 1201-1225 



Page 

 Department Bulletin No. 1218. — Horseflies: Biologies and Re- 

 lation to Western Agriculture: 



Historical 1 



Injuriousness and abundance 3 



Antelope Valley 4 



Breeding methods and equipment 6 



Oviposition cages 8 



The feeding cone 9 



Species involved 9 



Tabanus punctifer Osten Sacken 10 



Tabanus phaenops Osten Sacken 20 



Tabanus insuetus Osten Sacken 26 



Tabanus monoensis, n. sp 29 



Chrysops spp 31 



Natural enemies of tabanids 31 



Parasites 31 



Predators 32 



Protection of animals 33 



Repellents 34 



Repressive measures 34 



Poisoning tabanids 34 



Drainage 35 



Literature cited 36 



Department Bulletin No. 1219. — Delinting and Recleaning Cot- 

 tonseed for Planting Purposes: 



The rate of delinting 2 



Seeds cut by delinter saws 3 



Appearance of delinted seed 4 



Effect of delinting on germination 4 



Effect of delinting on the planting capacity 6 



Weight per bushel of delinted seed 7 



Delinting a prerequisite for recleaning 10 



Loss of good seeds in recleaning 12 



Dockage in delinting and recleaning 14 



Cost of delinting and recleaning 16 



Agricultural possibilities of delinted and recleaned seed 17 



Summaty of conclusions 18 



Department Bulletin No. 1220. — Farm Labor in Massachusetts, 

 1921: 



Object and methods of study 1 



Number, classes, and seasons of employment of farm employees 2 



Methods of obtaining farm employees 5 



Nationality, residence, ages, and dependents of farm employees 7 



Education and occupational history of farm employees 9 



Hours and days per week required of farm employees 14 



Wages, requisites, and living accommodations for farm employees __ 15 



Nonagricultural employment available 20 



Recreation and social standing of farm employees 21 



Savings and future plans of farm employees 22 



Improvement of the farm-labor situation 23 



Summary and conclusions 24 



Department Bulletin No. 1221. — The Capillary Distribution in 

 Soil Columns of Small Cross Section: 



The principal results of the experiments 2 



Results of previous experiments 3 



Experiments with soil columns of small cross section 3 



Plan of experiments 5 



Idaho sandy soil 7 



Idaho lava ash soil 9 



Whittier and Riverside soils 12 



Santa Clara and Cache Valley soils 14 



Distribution of moisture in horizontal soil columns 16 



Distribution of moisture in tubes inclined downward 19 



Summary 21 



