Technology

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PHYSIKALISCHEN WERKSTÄTTEN A.=G. GÖTTINGEN.

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GRAY, FRANK & J. W. HORTON & R. C. MATHES.

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MEALY, GEORGE H.

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POND, JOHN. - TROUGHTON'S ASTRONOMICAL CIRCLE DESCRIBED.

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HOUSTON, ALEXANDER CRUIKSHANK.

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KAUFMANN, WALTER.

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FRIIS, F.R.

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CARSON, JOHN R.

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WILLIAMS, W.J.

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UFANO, DIEGO. - THEODOR DE BRY.

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LILIENTHAL, OTTO. - THE FATHER OF MODERN AVIATION.

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URQUHART, J.W.

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