A NEW VOLUME OF THE UNIVERSITY OF CHICAGO SCIENCE SERIES 



The Living Cycads 



By Charles Joseph Chamberlain 



Professor of Botany in the University of Chicago 



This study includes investigations extending over fifteen years, that necessitated 

 trips to Cuba, New Mexico, Australia, and Africa. The author studied all the 

 genera and many of the species in the field, and preserved much material for later 

 study in the laboratory. 



In the first part of the book is given an account of the distribution, general 

 appearance, and field conditions of the cycads, together with some of the experiences 

 of an investigation involving much travel in distant and varied countries. In the 

 second part is presented the life-history of the group based largely on the author's own 

 observations in the field and laboratory. Part III is devoted to the evolution and 

 phylogeny of the cycads, the opportunity -for such a study being exceptionally favor- 

 able because the ancestry can be traced back through geological periods, and because 

 the extinct predecessors of the cycads are the best known of the fossil plants. 



xiv-\-i72 pages, cloth; $1.50, postage extra 



TO BE PUBLISHED APRIL 15 



Problems of Fertilization 



By Frank R. Lillie 



Professor of Embryology and Chairman of the Department of Zoology 

 in the University of Chicago 



As the problem of fertilization deals with the union of the male and the female 

 sex elements, which forms the beginning of each individual's life-history, it has 

 important bearings upon the problems of heredity. It also has close relations to 

 several other fundamental biological problems. 



Cloth; $!.'/§, postage extra 



OTHER PUBLISHED VOLUMES IN THE SERIES 

 The Evolution of Sex in Plants. By John Merle A Chemical Sign of Life. By Shiro Tashiro. 

 Coulter, x-l-140 pages, i2mo, doth; $1.00, post- x-l-142 pages, small i2mo, cloth; $1.00, postage 



age extra (weight 14 oz.). extra (weight 14 oz.). 



kidioiduality in Organisms. By Charles Manning ^^^ Biology of Twins. By Horatio Hackett 



CmLD. X-I-2I2 pages, small i2mo, cloth; $1.25, Newman. x+i86 pages, small i2mo, cloth; 



postage extra (weight i lb. 6 oz.). *^-^5, postage extra (weight i lb.). 



TL n • • r iL c- .L T,^ ^ '^°**'' Poisoning. By Edwin Oakes Jordan. 



I he Ungtn of the Earth. By Thomas C. viii-|-u6 pages, small i2mo, cloth; $1.00, postage 



Lhaiiberlin. xii -H 27 2 pages, small 1 2mo, cloth; extra (weight 11 oz ) 



S1.50, postage extra (weight i lb. 6 oz.). ff,^ Electron: Its Isolation and Measurement, and 



Finite Collineation Groups. ByHANS F.Blichfeldt. the Determination of Some of Its Properties. 



xii-Hi94 pages, small i2mo, cloth; $1.50, postage By Robert Andrews Millikan. xii 4- 268 pages, 



extra (weight i lb.). small i2mo, cloth; $1.50, postage extra (weight 



I lb. 3 oz.). 



VOLUMES PLANNED OR IN PREPARATION 

 Black Body Radiation. By Charles E. Mendenhall. 

 Mechanics of Delayed Germination in Seeds. By W. Crocker. 

 The Rigidity of the Earth and of Materials. By A. A. Michelson. 

 Linear Integral Equations in General Analysis. By Eliakim Hastings Moore. 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO ILLINOIS 



