FIRST PRINCIPLES OF HEREDITY

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TEXT-BOOK OF OPERATIVE SUR- GERY. By Dr. Tu. KoeiiKu. Third English Edition. With over 300 Illustrations, many with colour introducod.

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A TREATISE ON HYDRAULICS. By

Prof. W. C'AWTHClItNE U.NWIN, LL.D.,

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Author of " Hydraulics " in " Encyclopœdia Britannica. " lUustrated. Demy Svo, cloth, jirice 12s. 6d. net.

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MILK: Its Nature and Composition.

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