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Scientific American, Vol. 26, No. 15 (1872) (1872)

leaf 4

An illustration from Scientific American, Vol. 26, No. 15 (1872), 1872, leaf 4
mportance, as frictional gearing. And most that has been tinic power of red light; against this they had to contend, ThatI, D. Breed, a District man, written is upon the grooved wheels, which are frictional but in spite of all difficulties they succeeded in obtaining Havemade invention of a plan,… … But that, an almost useless thing, tion of these wheels as compared with helted pulleys. To save expense, away I fling, tion of the chromosphere and its prominences. Nine years Now a word as to what friction gearing is, where it has Of varied traps, with spiral walk must pass away before an eclipse…

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