LENGTHENING THE COITON FIBERS 



Egyptian cotton fiber combed out on the seed (slightly reduced froiVi natural 

 size) to illustrate the progress attained by the breeding work in Arizona. The 

 specimens are as follows: (1) From a first selection in tlie original stock of 

 Mit Afifi; (2) from a strain of Mit Afifi after three years of selection; (3) from 

 the parent plant of the Yuma variety; (4) from a plant of the Pima variety. 

 (Fig. 5.) 



