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Scientific American, Vol. 45, No. 5 (1881) (1881)

leaf 3

An illustration from Scientific American, Vol. 45, No. 5 (1881), 1881, leaf 3
rb the ly into the upper hemisphere, and has its entered end bent electrical balance at a greater depth than two inches. or looped so as to forma stirrer for agitating the contents The diagram shows the arrangement of battery, micro- of the receptacle. phone, and primary and secondary circuit… … Mr. Charles E. Friel, of city July 12. The seventy- ADJUSTABLE GUN STOCK: Fredericton, New Brunswick, five delegates present includ- Canada. The invention con- ed many of the more promi- The battery and microphone are in a closed circuit with sists in a spur mounted on a shaft in a recess in the…

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