.^.rsai IMillMl ■Mltlli T:r<^?'5L>->3- •x^* [Entered at tbe Post Office of New York, N. Y., as Second GIsas Matter. CopyrlKbt, 1900, bj Mann A Co.] A WEEKLY JOUIINAL OF PUCTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTUJIES. Vol. IjXXXIII.—No. 25.1 NEW YORK, DECEMBER 22, 1900.… … Testing the Records. Testing the Pbonographi, TEE UAirarACTirSX 07 ESIBON FH0H0&BA?S SECOBSS,—[See page 800.]
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