A NEW VOLUME OF THE UNIVERSITY OF CHICAGO SCIENCE SERIES 



The Living Cycads 



By Charles Joseph Chamberlaix 



Professor of Botany in the UniTxrsity of Chicago 



This studv 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 ^'aried 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 laborator>\ 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. 



.v?>+j-2 pages, doth; $1.50, postage extra 



TO BE PUBLISHED IN MAY 



Problems of Fertilization 



By Frank R. Lillie 



Professor of Embryology and Chairman of //«• Depj^'"""' "^ 7r,nln?\- 

 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 indi\-iduars life-history, it has 

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

 several other fundamental biological problems. 



Cloth; $1.75, postage extra 



OTHER PUBLISHED VOLUMES IN THE SERIES 



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



Coulter, x-f- 140 pages, umo, cloth; $1.00, post- x-i-142 pages, small i2mo, cloth; $1.00, postage 



age extra (weight 14 oz.)- "tra (weight 14 oz.). 



r J. .J I. . ^ T. .- »» ^ The Biology of Twins. By Hokatio Hackett 



Indmdualitym Organisms. By Ch.xrles Man^jing Xewsl^-. x-|-iS6 pages, small i2mo. cloth; 



Child, x + 21 > paps, smaJl i2mo, cloth; $1.25, 5, ,. posuge extra (weight i lb.). ' 



postage extra (weight i lb. 6 oz.). j,^ Poisoning. By Edwin O.^S ' Jord.^n. 



The Origin of the Earth. By Thomas C. viii -j-i 16 pages, small i2mo, cloth; Si. 00, postage 



Ch.\mberlin. iii-l-272 pages, small i2mo, doth; extra (weight 11 oz.\ 



81.50, postage extra (weight i lb. 6 oz.). ff,g Electron: Its Isolation and Measurement, and 



i -iteCollineationCroups. ByH.VfsF.BucHFELDT. the Determination of Some of Itj Properties. 



xii+194 pages, smaU i2mo, cloth; $1.50. postage By Robert Antjrews Millik.a^-. xii+205 pages 



extTa (weight 1 lb.). • ' = ^ small i2mo, cloth; $1.50, postage extra (weight 



I lb. 3 oz.). 



VOLUMES PLANNED OR IN PREPARATION 

 Black Body Radiation. By Ch.\rle5 E. Menden-haxl. 

 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 Ellaktv Hastings Moore. 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO ...--- ILLINOIS 



