by Melchers , F | .
by Bothe , H | .
by H. Ursprung | R. Nothiger.
by Hermann Remmert | .
by Pierre Legendre | Louis Legendre.
by Otto Hutzinger | .
by Edwin R. Lewis | .
by A. Hadas | .
by Arthur D. Hasler | .
by W.K. Lanenroth | .
by H. Precht | .
by B.E.S. Gunning | A.W. Roberds.
by J. Syfenga | .
by Hugh Dingle | .
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