Word: nickel
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Dates: during 1930-1939
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...remarkable feature of this meteor", continues Professor Luyten, "is that it felt cool, in spite of the tropical sun almost overhead, which made the surrounding limestone unpleasantly hot to touch. It is said that this meteor is not magnetic. The results of the chemical analysis show 17.42 per cent nickel and 81.29 per cent iron. This is an unusually high proportion of nickel. It is not surprising, therefore, that the meteor is extremely hard and especially tough. Investigation with a file led to the estimate that this nickel-iron alloy compares in hardness with the hardest steel used on railroads...