ation against the surfaces of the mold. excessively fragile, broke in cooling. In 1869, Becquerel Quite recently the ingot from which the standards are to In order to prevent the splitting, M. Clamond heated his presented to the French Academy a battery constructed by be made was cast, the utmost… … lightly pulverulent. When the crown are held in clamps of cop- platinum was melted, in a cavity per fixed in two standards, shown FURNACE FOB MELTING PLATINUM. hollowed in the Btone, the car- separately at the left of Fig. 2, plates, in which, however, the current gradually weakened bonic acid (due…
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