. The principles and processes of cotton yarn manufacture. Nelevation of lap h NOTE. O SIGNIFIES COMMON ,» METALLIC »>. liillfjilillllilihTilllliliiiiilfiliilMI Fig. 7S. 3. Draft Gfar equals draft constant divided by draft. Example:— ?; Gear == —, = c;o teeth ^ 4. Production. The speed of the 5-inch calender roll from which the production isusually computed is within the limits of 85 and 105 revolutions perminute. In practice the speed may, of course, be ascertained by calcula- COMBING 113 tion or more easily with help of a speed indicator. In the examples belowthe speed

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. The principles and processes of cotton yarn manufacture. Nelevation of lap h NOTE. O SIGNIFIES COMMON ,» METALLIC »>. liillfjilillllilihTilllliliiiiilfiliilMI Fig. 7S. 3. Draft Gfar equals draft constant divided by draft. Example:— ?; Gear == —, = c;o teeth ^ 4. Production. The speed of the 5-inch calender roll from which the production isusually computed is within the limits of 85 and 105 revolutions perminute. In practice the speed may, of course, be ascertained by calcula- COMBING 113 tion or more easily with help of a speed indicator. In the examples belowthe speed is assumed to be 100, the time ten hotirs, and the weight peryard of the lap delivered 200 grains. A. Theoretical :— 100 X 5 X X 60 X 10 X 200 Pounds in 10 hours = -^ = 748 36 X 7000 B. Actual Production. A deduction of 10 per cent, from the theoretical production forclaning, oiling and other stoppages gives good practical :— Pounds in 10 hours = 90 per cent, of 748 = COMBER The combing machine most commonly in use is known as the Heil-man Comber. It is manufactured b

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