CHAPTEE IV 



DEVELOPMENT OF THE BOLL: II. ENVIRONMENTAL 

 INFLUENCES 



BY studying in the previous chapter the stages of the 

 development of the boll in one pure strain, we reduced 

 the problem to its simplest terms, taking from this 

 strain a batch of flowers which all opened in the same plot 

 on the same day, and therefore went through experiences 

 as nearly uniform as was possible. The presentment thus 

 obtained is, nevertheless, correct in its general outlines 

 for other kinds of cotton. 



Before we can proceed further to some preliminary 

 attempts at analyzing the commercial cottons, a further 

 examination is needed, in which the Environment is 

 allowed to change. The accounts given in this chapter 

 are taken from data obtained with the same strain 

 No. 77 so as to avoid confusion, and also because it is 

 with this strain only that sufficiently comprehensive 

 data have been garnered. As in the previous chapter, 

 however, the results are generally applicable, with slight 

 modifications, to other kinds and environments. 



Then, in Chapter V. we shall consider the effects of 

 altering another component of the problem as well 

 namely, the Constitution of the plants cultivated. 



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