EXERCISE 47. A LABORATORY STUDY OF COTTON 



Equipment: A sufficient number of bolls of cotton to 

 supply each student with three different types. They should 

 be picked at least two weeks before they are needed. The 

 different types of bolls may be obtained from different 

 varieties or by taking bolls from the base, middle and top of 

 the same plant. 



Method: Determine the length of the lint taken from 

 the middle portion of the seed and record the average of five 

 determinations. Count the number of seeds in each lock; 

 note the color and amount of fuzz. Make counts and 

 weighings necessary to fill in the blanks in the following 

 table: 



Discussion : The cotton fiber grows in large capsules 

 called bolls. In the largo varieties 50 or 60 bolls will make a 



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