The Twentieth Century Text Books of Biology. 



PLANT RELATIONS, 12mo, cloth $1.10 



PLANT STRUCTURES, 1 2mo, cloth 1.20 



PLANT STUDIES, l2mo, cloth 1.20 



PLANTS, l2mo, cloth . .180 



ANALYTICAL KEY TO PLANTS, 12mo, flexible doth . . .75 

 All by JOHN MERLE COULTER. A M.. Ph D.. Head of Dept. of Botany. University of Chicago. 



They are already the preferred texts, and the 

 reasons will be apparent on examination. 



ANIMAL LIFE: A First Book of Zoology. 



By DAVID S. JORDAN. M. S., M. D , Ph. D., LL. D., President of the Leland Stanford Jun- 

 ior University, and VERNON L. KELLOGG, M. S., Professor in Leland Stanford Junior 

 University. 12mo. Cloth, $1.20. Now ready. 



Not a book for learning the classification, anatomy, and nomenclature af animals, but to 

 shoui how animals readied their present development, the effects of environment, their place 

 in Nature, their relatiotis to one another and to the human race. Designed for one-half 

 yearns work iti high schools. Send for sample pages. 



ANIMAL FORMS: A Second Book of Zoology. 



By DAVID S. JORDAN, M. S., M. D., Ph D , LL. D., and HAROLD HEATH, Ph D., 

 Professor in Leland Stanford Junior University. Ready in February, igoi . 



D. APPLETON AND COMPANY, Publishers, New York, Chicago, London. 



Recent Scientific Works 



TN Astronomy, Dr. Simon Newcomb's new book, pub- 

 •'• iLshed October, 1900; in Physics, the John.s Hopkins 

 text of Profe.ssors Rowland and Ames ; also in Physics 

 for second and third year high school work, the text 

 of Dr, Hoadley, of Swarthmore; in Physiology, the text 

 by Drs. Macy and Norris, based on the Nervous System; 

 also the High School Physiology indorsed by the W. C. 

 T. U., written by Dr. Hewes, of Harvard University; in 

 Geology, the Revised ««Compend" of Dr. Le Conte, and 

 the two standard works of Dana,— The Manual for Uni- 

 versity Work, and the New Text Book, revision and 

 rewriting of Dr. Rice, for fourth year high school work; 

 in Chemistry, the approved Storer and Lindsay, recom- 

 mended for secondary schools by , the leading colleges; 

 in Zoology, the Laboratory Manual of Dr. Needham, of 

 Cornell; and the Series •' Scientific Memoirs" edited by 

 Dr. Ames, of Johns Hopkins. Nine volumes ready. 

 The publishers cordially invite correspondence. 



AMERICAN BOOK COMPANY, Cincinnati 



