Word: rubbers
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Dates: during 1930-1939
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...copper; 35% of its electric power; 29% of its iron ore; 62% of its oil; 78% of its sulphur; 22% of its lead; 79% of its passenger automobiles and 66% of its trucks; 30% of its cotton and 67% of its silk goods; 67% of its rubber goods; 43% of its chemicals; 90% of its movies...
...Water is an excellent conductor of sound, much better than air. As in air, abound wave in water registers against a diaphragm as a series of mechanical impulses. One early type of hydrophone was like a crude telephone. A rubber diaphragm immersed in the water received the impulses, transmitted them to a carbon-granule chamber, thence through wires to the earphones...
...inflated rubber bicycle seat...
...support their contention they claim that he always were rubbers tied on with rubber bands, even when he was indoors. They also maintain that when he died there were 20 hornet nests in his bedroom
Among the few raw materials for munitions in which the United States is not self-sufficient are manganese, tin, rubber, tungsten, chromium, quinine, and others, Colonel Rutherford said. The estimates are that one year's national supply of certain strategic materials should be placed in reserve, and Congress has authorized spending $100,000,000 toward this end in the next four years...