424 



SOUTHERN FIELD CEOPS 



months, spread out on the ground for the purpose of favor- 

 ing the separation of the fiber from the adhering materials. 



FIG. 187. SHOCKING HEMP. 



When exposure to alternate freezing and thawing has ef- 

 fected its end, the hemp is again shocked. 



The fiber is separated on the farm chiefly by the old 

 device, called the hand-brake. In some regions this work 

 is performed by machinery. 



LABORATORY EXERCISES 



In regions where hemp is not grown, it is scarcely profitable 

 to spend a laboratory period on dried specimens and on the litera- 

 ture of this crop. Instead, this laboratory period may well be 

 devoted to some review or additional exercise relative to the 

 principal crop of the region where the school is located. 



LITERATURE 



BOYCE. Hemp. New York, 1900. 

 DEWEY, L. H. The Fiber Industries in the United States. U. S. 



Dept. Agr. Yearbook, 1901, pp. 541-544. 

 HARPER, J. N. Hemp. Bailey's Cyclo. Agr., Vol. II, pp. 377- 



380. 



HUNT, T. F. The Forage and Fiber Crops in America, pp. 394- 

 397. New York, 1907. 



