on Museum, etc., .should of the instrument, where it is provided with a platinum sponding deflection of the balance renders this plainly visi- pointed screw which passes through the lever at right angles ble. When the current is reversed, the deflection is in the be better known among all classes… … THE FBOFOSED NEW DEEP-SEA HARBOE AT BOULOGNE. 11878 SCIENTIFIC AMERICAN, INC.
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