Word: alloys
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...Casting several metals in one mold was a matter of memorizing the exact melting points of the various special alloys he employed. There was no welding. To cast a girl with a golden arm and a silver dress, for example, the arm would be cast first. When cool the hot silver alloy would be sucked into the same mold. Heat of the silver would fuse the arm to the body...
...steel trucking door was being closed one day last week when five desperadoes rushed in, disarmed the manager, bound ten employes together with heavy rope. Two of the gunmen guarded their prisoners, the other three rifled the plant of 30 bars of silver-gold-platinum-and-iridium alloy worth $50,000, took a rifle from the wall and $200 from the cash register for good measure. Then they vanished...
Known as R-B-M (Robertson-Bonded-Metal), the new steel is an amalgamation of three substances. Pure steel is coated with an alloy of tin, lead or zinc. The alloys are then heated to a temperature just beyond the plastic point but below the liquefaction mark. At this temperature felts can be cemented to the alloys. Upon cooling the felt adheres to the steel by means of the adhesive alloy. On the felt may be grafted further coatings-of asbestos, cellulose, imitations of wood, silk, jewels. The new metal may be rolled, drawn, pressed, corrugated. Chief difficulty...
Since any mechanical vibration is sharply resonant, and better than the best electric circuits which can be built Professor Pierce has also been at work on magnetostriction rods, usually an alloy of nickel and steel, used, experimentally, as a source of air waves, similar to sound waves, but above audible limit, especially in the range: 30,000 to 50,000 cycles. Such waves can be focused, confined to narrow beams like those from a searchlight. Both the quartz crystal and magnetostriction rod are being worked on for communication purposes, and are also used to study the elastic properties of materials...
...Just Like Gold in appearance, or almost, is Rumania's new metallic currency. Actually an alloy of small value (composition secret) it will, King Carol hopes, restore somewhat the Rumanian people's sadly shaken confidence in the coin of his realm...