Rurpees 



^ Seeds 



Growj 



and are 

 grown 

 notonly 



to sell but to grow again. 

 The fact that 1916, our forti- 

 eth anniversary, proved to be 

 our banner year, shows that 

 confidence in the House of 

 Burpee continues to grow just 

 as surely as Burpee's Seeds 



Grow. Each packet contains the result of our forty years of 



extensive operation and intensive investigation. 



Burpee's Annual for 1917 



The Leading American Seed Catalog 



is brighter, better and bigger than ever before. We have added 

 twentv-tvvo pages, making in all 204 pages, and best of all, you will 

 find thirty Burpee Specialties illustrated in color. Burpee's Annual 

 is mailed free upon request. A post card will bring it. Write 

 for your copy today and mention this publication. 



W. ATLEE BURPEE & CO. Burpee Buildings, Philadelphia 



LATEST STANDARD BOOKS ON EVOLUTION 



A Critique oC/Che Theory ..f Evolution 



hy THOMAS HUNT MORGAN 



Professor of Experimental ZooloKy, Columbia University 



Professor Morgan criticizes the older evi- 

 dence and tests the new. He traces the 

 thread of inherited characters throiifjh tlio 

 webof «'voliition's ini^lity wori<, and fi.xes 

 values for accidental variation and the 

 tendency "of living things to manifold 

 themselves." The style of the hook is 

 conscientiously objective. 



208 pa(/e.s, illuatrated: cloth, $1. .")(>, hy 

 wai7$1.58 



Hort'<Iily and Environment in the 

 Development of Men 



by EI>W1N GRANT CONKLIN 



Professor of Biology in Princeton University 



Of I'rofessor Conklin's hook the X. Y. 

 Ercniiuj I'nxl .says: "Conflicting .«pccu- 

 lalions, ohl and new. are presented with 

 a clearness and impartiality which win 

 the confidence of the reader and tend to 

 hring him to a sympathetic under- 

 standing of the aims and methods of 

 modern hiologieal investigations.' 



548 jxKjcs, illustrated; cloth, $^>.()(), by 

 mail^'i.U) 



Complete catalogue on request. 



PRINCETON UNIVERSITY 



PRINCETO.N 



PRESS 



NEW JERSEY 



