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Scientific American, Vol. 15, No. 24 (1866) (1866)

leaf 17

An illustration from Scientific American, Vol. 15, No. 24 (1866), 1866, leaf 17
quarto of eight pages. In 1859, en- formed at the top, countersunk on the upper surface couraged by the great success which met their efforts, the Pub- them to escape the notice of the superficial observer ; to receive ball valves, which may be marbles or the lishers determined to double its size… … vented from escaping by wires or staples stretched yet, in not a few instances, they have competed, in. business amounting to more than one-third of all the claims pre- sented at the Patent Office. across the holes, as at B. actual general value and in pecuniary profit, with With such advantages…

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