Because of the great commercial importance of cotton fibers, their structure at various stages of development has been carefully studied. An indication of the work that has been done along this line may be gained from the papers of Dischendorfer {6),^ Youngman and Pande {63), and Kerr {21), which give a number of literature citations. Structure of the seed {I4, v, 3; 32; 33; 34; 35; 36; 37) and...