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GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. 



By Dr. I. ROSENTHAL, Professor of Physiology at the University of 

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SIGHT : An Exposition of the Principles of Monocular and Binocular 

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ANIMAL LIFE, as affected by the Natural Conditions of Existence. 

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THE ATOMIC THEORY. By AD. WURTZ, Membre de 1'Institut ; 

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THE CRAYFISH. An Introduction to the Study of Zoology. By 

 Professor T. H. HUXLEY, F.R.S. With 82 Illustrations. 12mo. 

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