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Scientific American, Vol. 11, No. 15 (1864) (1864)

leaf 3

An illustration from Scientific American, Vol. 11, No. 15 (1864), 1864, leaf 3
gs in the copper mines of Lake published within a few months. We give one of these the lock; it would not work as now shown. The prin- Superior show that they had been preceded by a race accounts taken from the proceedings of the Royal ciple of the thing is, however, correcfly delineated, |… … by him in this country, ‘Having formerly been ' and having similar depressions pecked in its opposite ‘«Professor Owen minutely details the circum- a reader of your paper and knowing that you are stances under which these discoveries were made; | Sides. Mr. Pealesays that he has several of these in…

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