The University of Cliicago Press 



THE EVOLUTION OF SEX IN PLANTS 



(The University of Chicagfo Science Series) 



By John Merle Coulter, Head of the Department of Botany in the Uni- 

 versity of Chicago, 

 viii + HO pages, small 12mo, cloth; 4s. net. 



In this fir.st volume of the new "University of Chicago Science Series" Professor 

 Coulter, the editor of the Botanical Gazette and the author of numerous volumes on 

 botanical science, has given a presentation of the results of research showing that all 

 reproduction is the same in its essential features and all methods of reproduction are 

 natural responses to the varying conditions encountered by plants in their life histories. 

 Sex reproduction, the author says, is simply one kind of response, the sex feature not 

 being essential to reproduction, but securing something in connection with the process. 

 Various phase.s of the subject discussed include the evolution of sex organs, the alternation 

 of generations, the differentiation of sexual individuals, and parthenogenesis. The last 

 chapter, which offers a theory of sex, reviews the more prominent facts set forth in 

 preceding parts of the volume, and serves both as a summary and a working hypothesis. 



This series recently established by the Trustees of the University owes its origin to a 

 feeling that there should be a medium of publication occupying a position between the 

 technical journals, with their short articles, and the elaborate treatises which attempt to 

 cover several or all asjiects of a wide field. The volumes of the aeries will differ from the 

 discussions generally appearing in technical journals in that they will present the complete 

 results of an experiment or series of investigations which have previously appeared only 

 in scattered articles, if published at all. On the other hand they will differ from detailed 

 treatises by confining themselves to specific problems of current interest and in presenting 

 the subject in as summary a manner and with as little technical detail as is consistent 

 with sound method. They will be written not only for the specialist but also for the 

 educated layman. The size of the volumes will range from fifty to one hundred and fifty 

 pages. 



In preparation for early publication in the same series with Professor 

 Coulter's book are volumes on 



THE ORIGIN OF THE EARTH 



By Professor Thomas 0. Chahberlin, Head of the Department of Geology, 



and 



THE ISOLATION AND MEASUREMENT 

 OF THE ELECTRON 



By Professor Robert Andrews Millikan, of the Department of Physics. 



ARTIFICIAL PARTHENOGENESIS AND 

 FERTILIZATION 



By Jacques Loeb, Member of the Rockefeller Institute for Medical Research. 



The first complete treatment of the subject of artificial parthenogenesis in English. 

 It gives an account of the various methods by which unfertilized eggs can be caused to 

 develop by physico-chemical means, and the conclusions which can be drawn from them 

 concerning the mechanism by which the spermatozoon induces development. Since the 

 problem of fertilization is intimately connected with so many different problems of physi- 

 ology and pathology, the bearing of the facts recorded and discussed in the book goes 

 beyond the special problem indicated by the title. 



x-f312 pages, 12mo, cloth; 10s. net. 



The Cambridge University Press 



Agents for the British Empire 



London, Fetter Lane 



