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Scientific American, Vol. 43, No. 22 (November 1880) (1880)

leaf 7

An illustration from Scientific American, Vol. 43, No. 22 (November 1880), 1880, leaf 7
h such explosives as nitro- This arrangement possesses the advantage of excluding ex- experienced pleasure and advantage from a daily cold bath glycerine, dynamite, gun cotton, gunpowder, or fulminates. traneous sounds and of preventing bystanders from hearing have to discontinue the practice is… … has dispensed with a special call bell magnet, to be unmanly, while in reality it is truly scien- MeDERMOTT'S TELEPHONE. using the magnet of the induction coil for the tific, and to bathe in unheated water all the year purpose of operating the bell hammer armature. round, whatever the temperature…

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