A Model BoLanical TexL-Book 



LEAVITT'S OUTLINES OF BOTANY, $1.00 



With Cray's Field, Forest and Garden Flora, . 1 .80 



With Gray's Manual of Botany, .... 2.25 



For the High School Laboratory and C/ass Room. 



By ROBERT ClRKENl.EAF LEAVITT, A. M., of the Ames 

 Botanical Laboratory. Prepared at the request of the Botan- 

 ical Department of Harvard University. 



THE practical exercises and experiments have been so chosen that they 

 may be performed by schools with even simple apparatus. The in- 

 structions for laboratory study are placed in divisions by themselves, 

 preceding the related chapters of descriptive text. The book combines the 

 best features of the newest methods with that lucidity and definiteness which 

 have given Dr. Gray's text-books their extraordinary success. It pays s])ecial 

 attention to ecology, but morphology and physiology are also fully treated. 

 The illustrations number 3S4, and have been drawn with great care and 

 accuracy. The api)endix contains valuable suggestions for the teacher, and 

 the index is very complete. 



American Book Company 



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PSYCHE 



A JOURNAL OF ENTOMOLOGY 

 Established in 1874 



Publishes technical papers by recognized authorities, and po]5ular articles 

 characterized by high scientific accuracy, giving jjarticular attention to ex- 

 ])erimental work. .\ syuojjsis of current entomological literature apjiears in 

 each number. Much space is given to problems connected with the insect 

 fauna of New England. 



Six Numbers a year: — February, April, June, August, October, Decem- 

 ber. Annual subscription One Dollar. 

 Camhridge Entomoi.ogic.M. Ci.ui!, 234 Berkeley St., Boston, U. S. A. 



THE PLANT WORLD, 



An Illustrated Monthly Magazine of Popular Botany. 



$1.00 a year. Established 1897 13 numbers 



Official Organ of the Wild Flower Preservation Society of America. 

 If you are interested in Botany the PLANT WORLD will interest you. 

 If you are a teacher of Botany, the PLANT WORLD will help you 

 by keeping you in touch with modern botanical thought. 

 Edited by Francis E. Lloyd 



Teachers College, Columbia University, 

 Send two cent stamp for sample cojiy. New York City. 



