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Scientific American, Vol. 44, No. 10 (March 1881) (1881)

leaf 4

An illustration from Scientific American, Vol. 44, No. 10 (March 1881), 1881, leaf 4
rest: The survey has give more room for working. From our English contemporaries we learn that several been going on six and a half years, and two and a half years The combs are covered by metal caps,/, when not in use new descriptions of prismatic powder are being prepared at more will be required… … found to be the best yet pro- and prevent it from slipping CHESTER'S FOG HORN FOR VESSELS. duced. The government off the hatchel. works at Waltham Abbey This invention was recent- have manufactured some prisms so large as to weigh 4§ counties have been fully surveyed and eighteen partially; D.…

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