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Scientific American, Vol. 54, No. 3 (1886) (1886)
leaf 7
ement of hour, and 1 year is 24 hours in the same measure. shafts,a@ and 0, and the differential motion; similar the parts. The hour hand on the large dial therefore represents letters refer to the same parts in the different engrav- Firmly secured on a solid base of metal are two regu- the sun’s… … sarily follow f, and in proportion to the speed of the Fig. 4.-8IDE VIEW OF THE DIFFERENTIAL MOTION. © 1886 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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