COTTON STRUCTURE 



261 



237. Storm resist- 

 ance. The struc- 

 ture of boll most 

 favorable to " storm 

 resistance," or per- 

 sistence of the seed 

 cotton in the bur, is 

 the following : 



(1) A firm stiff wall, 

 which on drying does 

 not curl backward, 

 but serves to support 

 and protect the seed 

 cotton (Fig. 129). 



(2) Sufficient sepa- 

 ration of the parts of 

 the bur to make pick- 

 ing easy, but not 

 enough to permit 

 each lock to hang 

 separately. 



FIG. 129. STORM-RESIST- 

 ANT BOLL AND BURS 

 ABOVE ; BELOW, BOLLS 



AND BURS LACKING 



STORM RESISTANCE. 



Below, the wallsof the bur 

 are rolled back, permitting 

 the locks of seed cotton to 

 separate and fall back- 

 ward ; above, the walls of 

 the bur do not curve back- 

 ward, but support the seed 

 cotton in a compact mass. 



