0. APPLETON & 00,'S PUBLICATIONS, 



GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. 



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

 Erlangen. With seventy-five Woodcuts. ("International Scientific 

 Series.") 12mo. Cloth, $1.50. 



" The attempt at a connected account of the general physiology of muscles and 

 nerves is, as far as I know, the first of its kind. The general data for this branch 

 of science have been gained only within the past thirty years." Extract from 

 Preface. 



SIGHT : An Exposition of the Principles of Monocular and Binocular 

 Vision. By JOSEPH LE CONTE, LL. D., author of "Elements of Ge- 

 ology"; "Religion and Science"; and Professor of Geology and 

 Natural History in the University of California. With numerous 

 Illustrations. 12mo. Cloth, $1.60. 

 " It is pleasant to find an American book which can rank with the very best 



of foreign works on thin subject. Professor Le Conte has long been known as 



an original investigator in this department ; all that he gives un is treated with 



a master-hand. 1 ' The Nation. 



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

 By KARL SEMPER, Professor of the University of Wiirzburg. With 

 2 Maps and 106 Woodcuts, and Index. 12mo. Cloth, $2.00. 

 "This is in many respects one of the most interesting contributions to 



zoological literature which has appeared for some time." Mature. 



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

 Doyen llonoraire de la Faculte de M6decine ; Professeur a la Facult6 

 des Sciences de Paris. Translated by E. CLEMINSHAW, M. A., F. C. 

 S., F. I. C., Assistant Master at Sherborne School. 12mo. Cloth, 

 $1.50. 



"There was need for a book like this, which discusses the atomic theory both 

 in its historic evolution and in its present form. And perhaps no man of this 

 age could have been selected so able to perform the task in a masterly way as 

 the illustrious French chemist, Adolph Wnrtz. It is impossible to convey to the 

 reader, in a notice like this, any adequate idea of the scope, lucid instruct! veness, 

 and scientific interest of Professor Wurtz's book. The modern problems of 

 chemistry, which are commonly so obscure from imperfect exposition, are here 

 made wonderfully clear and attractive." The Popular Science Monthly. 



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

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

 Cloth, $1.75. 



" Whoever will follow these pages, crayfish in hand, and will try to verify for 

 himself the statements which they contain, will find himself brouirnt face to face 

 with all the great zoological questions which excite so lively an interest at the 

 present day." 



"The reader of this valuable monograph will lay it down with a feeling of 

 wonder at the amount and variety of matter which has been got out of so seem- 

 ingly slight and unpretending a subject." Saturday Review. 



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