Scientific Publications. 



GENSBAI. PHTSIOLOGT OF MXrSCI.ES AND NERVES. By Dr. I, 



KosENTHAi., Professor of Physiology at the University of Erlangen. With 

 seventy-flye Woodcuts. (" International ScieDtiiic Series.") 12mo, cloth, 

 $1.60. 



"The attempt at a connected account of tlie general physiology of mascles 

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

 Aranch of science have been gained only within the past thirty yeBiTa."—Metract 

 from Prtface. 



SIGHT : An Bxposition of the Principles of Monocnlar and Binocular Vision 

 By Joseph Le Cohte, LL.D., author of "Elements of Geology"; "Re- 

 ligion and Science " ; and Professor of Geology and Natural History in the 

 University of California. With numerous lUastrations. ISmo, cloth, $1.50. 



*' It is pleasant to find an American book which can rank with the very beat 

 of foreign works on this sabiect. Professor Le Conte has long been known as 

 an ori$>inal investigator in tbis department ; all tbat he gives db is treated with 

 a master-hand." — The JNation. 



ANIMAI. I.IFE, as affected by the Natural Conditions of Existence. By 

 Earl Semfer, Professor of the University of Wilrzburg. With 2 Maps 

 and 106 Woodcuts, and Index. ISmo, cloth, $2.00. 



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

 zoological literature which has appeared for some time." — Nature. 



THE ATOMIC THEORY. By AD. WtTBTZ. Membre de I'lnstltut ; Doyen 

 Honoraire de la Faculty de M6decine ; Professeur^ la Faculty des Sciences 

 de Paris. Translated by E. Cleminshaw, M. A., F.C.8., P. I. C, ABsist- 

 ant Master at Sherborne School. ISmo, 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 tbis 

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

 the illustriouB French chemist, Adolph Wurtz. It is impossible to convey to the 

 reader, in a notice like this, any adequate idea of the scope, lucid instructiveness, 

 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. E. 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 brought 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- 

 icgly slight and unpretending a sahieaV— Saturday Beview. 



D. APPLETON & CO., Publishers, 



1, 3, & 5 Bond Strsbt, Niw Yobi;. 



