[Illustration]

Weight of transmission rope = .34 X dia.²
Breaking strength = 7,000 X dia.²
Maximum allowable tension = 200 X dia.²
Dia. smallest practicable sheave. = 36 X dia.
Velocity of rope (assumed) = 5,400 ft. per minute.{251}

HORSE-POWER TRANSMITTED BY MANILA ROPE.

[Illustration]

SAG OF MANILA ROPE ON DRIVING AND SLACK SIDES.

[Illustration]{252}

NUMBER OF RING AND MULE SPINDLES IN UNITED STATES.