386 THE FORAGE AND FIBER CROPS IN AMERICA 



(d) Length of 10 seeds in. 



Width of 10 seeds in. 



(e) Test tensile strength milligrams. 



N. B. The distance between the point of attachment of fiber and the point 

 of suspension of weight should be the same in every case. 



488. CROSSING COTTON. Select plants of the type which it is desired to 

 cross, which have a half dozen buds about to open, and remove all other buds 

 or flowers. The flowers on the plants to be used as female parent should be 

 emasculated by carefully clipping away the petals and the enclosed stamens, 

 care being taken that none of the anthers are broken, and the pollen dropped 

 upon the stigma. Both the plants of the female and the male parents may 

 be covered with paper bags or as directed for wheat. (C. A. 196) When 

 the clefts of the stigma open, which is usually at or just before sunrise, dust 

 them with pollen from a flower which has just opened and taken from the 

 plant to be used as the male parent. For convenience in handling, the petals 

 may be clipped off of the male flower. 



489. COLLATERAL READING. F. Wilkinson: The Story of the Cotton Plant. 

 New York: D. Appleton & Co., 1899. 



D. A. Tompkins: Cotton and Cotton Oil. Charlotte, N C.: The Author, 

 1901. 



C. P. Brooks: Cotton, pp. 274-308. New York: Spon & Chamberlain, 1889. 



Louis Edgar Andes: Vegetable Fats and Oils, pp. 110-117. London: Scott, 

 Greenwood & Co., 1897. 



Leebert Lloyd Lamborn: Cottonseed Products, pp. 16-30, 31-40. New York: 

 D. Van Nostrand Co., 1904. 



