Word: iron-nickel
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...basaltic rock that forms the ocean floors and is found in such widely scattered locations as the Hudson River Palisades, the Brazilian Plateau, the Hawaiian Islands and India. Like its counterpart on earth, the lunar material consists largely of oxygen (58%) and silicon (18.5%). It also contains aluminum (6.5%), iron-nickel (5.5%), magnesium (3%), and smatterings of carbon...
...waves travel through the earth, they are bent and reflected in complicated ways. Some waves move faster than others; some are absorbed entirely. By disentangling the jiggly lines made by instruments recording many earthquakes, seismologists have determined that the earth is formed of concentric layers of different materials, with iron-nickel at the center and stony oxides nearer the surface...
...What was iron doing in cold space many million miles away from the nearest star? Struve concluded that both stars, Antares and Companion, must be surrounded by a vast swarm, of meteors, like the iron-nickel meteors which bombard the earth. Apparently they shoot through an enormous region 50,000 times as wide as the diameter of the sun (865,000 miles). They may be attracted mainly by the powerful gravitation of massive Antares. But they show up on Astronomer Struve's spectroscope because intense ultraviolet rays from the hot, blue Companion make them glow with telltale light...
Physics 11.--The Theory of Primary and Secondary Batteries, Galvanic Cells; Lead, Iron-Nickel, and Thallium Storage Batteries: Electricity direct from coal. Tu., Th., Sat., at 10. Dr. H. W. Morse...
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