The Twentieth Century Text Books of Biology. 



PLANT RELATIONS, 12mo, cloth . . . . . $1.10 



PLANT STRUCTURES, 12mo, cloth ... . . 1.20 



PLANT STUDIES, 12mo, cloth 1.20 



PLANTS, 12mo, cloth . . 1.80 



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

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



2'hey are already the preferred texts^ and the . 

 reasons will he 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. N'ow ready. 



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

 show how animals reached their present development, the effects of environment, their flace 

 in Nature, their relations to one another and to the human race. Designed Jor one-half 

 year's ivork in high schools. Send for sa7nple pages. 



KmiAP<L 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 Febriiary, igoi. 



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



Recent Scientific Works 



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

 . *■ lished October, 1900; in Physics, the Johns Hopkins 

 text of Professors Rowland and Ames; also in Physics 

 for seeond and third year hif?li school work, the text 

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

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

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

 T. U,, written by Drs. 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 tlie leading colleges; 

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

 Cornell; and the series "Scientific Memoirs" edited by 

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

 The publishers cordially invite correspondence. 



AMERICAN BOOK COMPANY, Cincinnati 



