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Page:Popular Science Monthly Volume 18.djvu/230

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218
THE POPULAR SCIENCE MONTHLY.

household that desired is rarely above one horse, and generally under it. A more complicated machine can, moreover, be used with success in the workshop than in the household, as in the latter it would generally

Fig. 1.
PSM V18 D230 Homemade power generating wind mill.jpg

be in the care of attendants but little, if any, skilled in the use of machinery. Certain general conditions are, however, common to all. The work for which it is needed is generally of an intermittent