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Scientific American, Vol. 95, No. 22 (December 1906) (1906)

leaf 11

An illustration from Scientific American, Vol. 95, No. 22 (December 1906), 1906, leaf 11
out R.A. = 3h. 40m., versity announces a series of nine evening technical Dec. = + 23.5 deg., and having exposures of from A NOVEL TWO-PART HOOK. courses which will be given at the university this one to four hours, were examined with the usual The ordinary hook, used by lumbermen for attach-… … strong, unless the variations are large. The region of which the hooks may be opened is limited by a pin the Southern Cross and the "Coal-Sack" has been & NOVEL TWO PART HOOK. on one member, which engages a slot in the other. examined on thirteen plates, three of which have One of the principal…

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