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Journal of Agricultural Research 
Vol. XXV, No. 4 
(15) Three factors seemed to influence the lengthening of the matura¬ 
tion period for Pima bolls in 1921: The early bolls were smaller; they 
reached mature structural development in fewer days; and they reduced 
boll moisture to the opening stage more rapidly than the later bolls. 
(16) The growth of Sea Island and Meade cotton bolls was determined 
in South Carolina during 1922 by recording the volume and green weight 
of growing bolls collected at seven-day intervals after flowering. 
(17) The Sea Island bolls reached their mean maximum volume of 
about 19 cc. and their mean maximum green weight of about 16 gm. in 
21 days after flowering. 
(18) The Meade bolls reached their mean maximum volume of about 
29 cc. in 21 days and their mean maximum green weight of about 27 gm. 
in 28 days after flowering. 
(19) A mean maturation period of 57.6 days was obtained for the Sea 
Island bolls, in comparison with 56.14 days for the Meade bolls, and the 
period of maturation was found to increase as the season advanced. 
