LINT PERCENTAGE AND LINT INDEX OE COTTON. 



lint index msiy be found in varieties differing greatly in their percent- 

 ages of lint.; in other words, that tile lint index is a measure of the 

 abundance of the lint independent gi the percentage of lint. There- 

 fore, the number of bolls necessary to be picked to yield a bale of 

 lint remains constant for each lint index regardless of the percentage 

 of lint. 



Five-locked bolls to the number of 88,500 will yield a bale of cot- 

 ton in all varieties having a lint index of 6, and 133,500 five-locked 

 bolls will be required in all varieties having a lint index of 4. 



A variety of cotton which has a lint index of 4 and a lint per- 

 centage of 33 will have seeds weighing 8,1 grams per hundred, or 12.1 

 grains per hundred unginned seeds. (Table II.) A variety with a 

 lint index of 5 and the same lint percentage will have seeds weighing 

 10.1 grams per hundred, or 15.1 grams per hundred unginned seeds. 

 Therefore, if the laborers pick at the rate of 1,500 bolls per hour and 

 the average number of seeds is between 40 and 45 to the boll, 1,500 

 bolls of the variety with' the lint index of 4 will weigh 7,713.7 grams, 

 or 17 pounds and 0.09 ounce. Fifteen hundred bolls of the variety 

 with the lint index of 5 will weigh 9,626.2 grams, or 21 pounds and 

 3.5 ounces, of seed cotton. Thus, there is a difference of 1,912.5 

 grams, or 4 pounds and 3.4 ounces, per hour, or 24.8 per cent in favor 

 of the variety with the lint index of 5.. In other words, the man 

 picking in the variety with the lint index of 5 will gather the same 

 quantity of cotton fiber in eight hours that the one working in the 

 variety with the lint index of 4 will gather in 10 hours, and if both 

 men work a full 10 hours, picking the same number of bolls per hour, 

 the one in the variety with the lint index of 5 will have 24.8 per cent 

 more pounds of seed cotton at the end of the day than the man work- 

 ing in the variety with the lint index of 4. This may account for 

 the fact that pickers often gather more cotton in a day in one man's 

 field than in another's, and may also suggest a reason for the other- 

 wise unexplainable aversion which pickers have for some fields. 



Table III. — Comparison of two varieties of cotton grown in southern Georgia. 





Lint. 



Comparison of 5-locked bolls. 





Per 



cent- 

 age. 



Index. 



Length. 



Weight 

 of 10 

 bolls. 



Number to the 

 pound. 



Number required 



to yield one 

 500-pound bale. 





Variety. 



Of 



seed 



cotton. 



Lint. 



Total. 



Per 

 plant 



(at 

 10,600 

 plants 



per 

 acre). 



Esti- 

 mated 

 percent- 

 age. 



A 



36 

 41 



Inches. 

 8. 7 1A 

 6 4 



Grams. 

 109 

 72 



42 



63 



116 

 158 



58,000 

 79,000 



5.5 

 7.5 



40 to 45 



B 



20 to 25 











