This section is from the book "Scientific American Reference Book. A Manual for the Office, Household and Shop", by Albert A. Hopkins, A. Russell Bond. Also available from Amazon: Scientific American Reference Book.
[Twelfth Census, Vol. VII, pages CCCXVI, and 582.]
Date of Census. | Per Cent, of Increase. | ||||||
1900. | 1890. | 1880. | 1870. | 1890 to 1900. | 1880 to 1890. | 1870 to 1880. | |
Total number of establishments. | 512,191 | 355,405 | 253,852 | 252,148 | 44.1 | 40.0 | 0.7 |
Total number of establishments reporting power................ | 169,364 | 100,726 | 85,923 | (1) | 68.1 | 17.2 | |
Per cent of establishments reporting power to total number................. | 33.1 | 28.3 | 33.8 | ||||
Total horsepower....................... | 11,298,119 | 5,954,204 | 3,410,837 | 2,346,142 | 89.8 | 74.6 | 45.4 |
Average horsepower per es- | 66.7 | 59.1 | 39.7 | 29.3 | 12.9 | 48.9 | 326.9 |
Steam engines: | |||||||
Number................ | 156,051 | 91,403 | 56,483 | (1) | 70.7 | 61.8 | |
Horse power................... | 8,741,338 | 4,581,305 | 2,185,458 | 1,215,711 | 90.8 | 109.6 | 79.8 |
Per cent of total horsepower...................... | 77.4 | 76.9 | 64.1 | 51.8 | |||
Gas engines: | |||||||
Number................ | 14,884 | (1) | (1) | (1) | |||
Horsepower.................. | 143,850 | 8,930 | (1) | (1) | 1,510.9 | ||
Per cent of total horsepower............... | 1.3 | 0.1 | |||||
Number................ | 39,168 | 39,005 | 55,404 | (1) | 0.4 | 329.6 | |
Horsepower.................. | 1,726,661 | 1,255,045 | 1,225,379 | 1,130,431 | 37.6 | 2.4 | 8.4 |
Per cent of total horsepower............... | 15.3 | 21.1 | 35.9 | 48.2 | |||
Electric motors: | |||||||
Number................ | 16,912 | (1) | (1) | (1) | |||
Horsepower.................. | 310,729 | 15,569 | (1) | (1) | 1,895.8 | ||
Per cent of total horsepower................. | 2.8 | 0.3 | |||||
Other power: | |||||||
Number................. | 2,144 | 0) | (1) | (1) | |||
Horsepower.................. | 54,490 | 4,784 | (1) | (1) | 1,039.0 | ||
Per cent of total horsepower..................... | 0.5 | 0.1 | |||||
Total rented horsepower..... | 321,051 | 88,571 | (1) | (1) | 262.5 | ||
Per cent of total horsepower................. | 2.8 | 1.5 | |||||
Electric rented horsepower. | 183,682 | (4) | (1) | (1) | |||
All other rented horsepower......................... | 137,369 | (4) | 0) | (1) |
1 Not reported. 2 Average for all establishments. 3 Decrease. 4 Not reported separately
 
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