Abstract
This article attempts to deal with the subject in a non-technical manner. The control of the amount of moisture in cotton laps delivered to the card room is highly desirable. Cotton manufacturers desire uniform weights for any given unit of length from the ounces per yard of picker laps to the grains per hank in the final yarn. If laps delivered to the card room contain widely varying percentages of moisture, though a lap scale may indicate identical gross weights, a variation in weight per yard is immediately begun at the cards which must be corrected by gear changes in subsequent operations. By holding picker laps to very close limits as to the net weight of cotton contained for the same number of yards of lap produced, the beginning of evenness or the elimination of variation in subsequent operations is attained.