A mechanical horse power is 33,000 pounds elevated one foot per minute, and is equal to elevating 3,957 gallons of water one foot per minute.

Animal-Power

Animal-Power ; working eight hours per day, in pounds raised one foot per minute

Horse or mule, large - 22,000 Man, as in rowing - - 4,000

Horse or mule, small - - 18,000 Man, on tread-wheel - 3,100

Ox, average .... 12,000 Man, turning a crank - 2,600

Ass, average.....3,500 Mechanical Horse-Power 33,000

Horse-Power, Belting will Transmit with Safety

 Width of Belt in Inches Horse-Power, per 100 feet Velocity of Belt Width of Belt inInches Horse-Power per 100 feet Velocity of Belt Belt Single Double Belt Single Belt Double Belt 1 .09 .18 12 1.09 2.18 2 .18 .36 14 1.27 2.55 3 .27 .55 16 1.45 2.91 4 .36 .73 18 1.64 3.27 5 .45 .91 20 1.82 3.64 6 .55 1.09 22 2.00 4.00 7 .64 1.27 24 2.18 4.36 8 .73 1.46 28 2.55 5.09 9 .82 1.64 32 2.91 5.82 10 .91 1.82 36 3.27 6.55 11 1.00 2.00 40 3.64 7.27

## Horse-Power

The following table shows the indicated horse-power for each pound average pressure on a square inch for different diameters and speeds of pistons.

 Diameter of CylinderInches Speed of Piston in Feet a Minute 240 300 400 500 600 4 .091 .114 .152 .19 .228 4 1/2 .115 .144 .192 .24 .288 5 .144 .18 .24 .30 .36 5 1/2 .173 .216 .288 .36 .432 6 .205 .256 .342 .428 .513 6 .245 .307 .409 .512 .614 7 .279 .348 .466 .583 .699 7 1/2 .321 .401 .534 .669 .802 8 .365 .450 .608 .761 .912 81/2 .413 .516 .688 .86 1.032 9 .462 .577 .77 .963 1.154 91/2 .515 .644 .859 1.074 1.288 10 .571 .714 .952 1.190 1.428 10 1/2 .63 .787 1.050 1 313 1.575 11 .691 .864 1.152 1.44 1.728 11 1/2 .754 .943 1.257 1.572 1.886 12 .820 1.025 1.366 1.708 2.050 13 .964 1.206 1.608 2.01 2.412 14 1.119 1.398 1.864 2.331 2.797 J5 1.285 1.606 2.131 2.671 3.212 16 1.461 1.827 2.436 3.045 3.654 17 1.643 2.054 2.739 3.424 4.108 18 1.840 2.312 3.083 3.854 4.624 29 2.061 2.577 3.436 4.295 5.154 20 2.292 2.855 3.807 4.759 5.731 21 2.518 3.148 4.197 5.247 6.296 22 2.764 3.455 4.607 5.759 6.911 23 3.021 3.776 5.035 6.294 7.552 24 3.209 4.111 5.482 6.853 8.223 25 3.569 4.461 5.948 7.436 8.923 26 3.861 4.826 6.435 8.044 9.052 27 4.156 5.199 6.932 8.666 10.399 28 4.477 5.596 7.462 9.328 11.193