Volume 75: James and William Macarthur business correspondence, 1823-1877: No. 298

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[Page 298]

always obtained direct from the Patentees.

The width of belting either India rubber or leather per horse power is dependent upon the velocity at which it travels.

2000 feet velocity of circumference
of pulley per minute will
require width of belt for
each Horse power
1000 feet     Do       Do 1 inch
 500 feet      Do       Do 2 inches

These proportions may be deviated from to a limited extent, depending upon the quality of the belt.

We have directed pulleys for your shafting to be cast, in case you intended us to prepare your shafting and motions, although you did not state such to be your intention in your letter, yet you did not state that such was not to be

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