HOWARD AND HOWARD. 29 



of any improved type and to prevent deterioration ai'ising from 

 indiscriminate crossing. Some rogueing might be done in certain 

 cases in the seedling stage and the process could be continued and 

 completed before the time of flowering. Cook' in a recent paper 

 has drawn attention to the desirability of weeding out aberrant 

 plants in cotton cultures grown for seed when the maintenance of 

 the quality of any improved type is aimed at. For this purpose 

 he suggests the vegetative characters of the desirable kind should 

 be carefully studied and that any plants differing in habit should 

 be removed as quickly as possible. 



' Cook, Cotfoii xi'lect'ioi, on the farm hji the charactem of 1lii> stalks, ]ct, rcK ,'\- holh, Cw- 

 cular No. <j(i, I'.iireau of Plant Inrlustry, Washington, D.C., August 1910. 



