are drawings (partly graphical reconstructions of approximately median 

 sections), the rest are photomicrographs. The quality of reproduction of the 

 latter is reasonable. 



The bibliography contains 228 titles. The bock contains author and subject 

 indexes. 



"A SYMPOSIUM ON 

 THE CHEMICAL BASIS OF DEVELOPMENT" 



1958 



Editors: W. D. McElroy and B. Glass The Johns Hopkins Press 



934 pp., more than 272 figs. Baltimore, Md. 



Price: $ 15.— 



The present book consists of 42 papers and discussions presented during a 

 symposium held under the sponsorship of the McCollum-Pratt Institute of the 

 Johns Hopkins University. 



The subject matter is subdivided into four sections, viz. "developmental 

 cytology" (8 papers), "cellular and tissue interactions in development" (7), 

 "problems of specificity in growth and development" (16), and "control 

 mechanism in development" (11). The book is concluded by a systematic 

 summary of the entire symposium written by one of the editors (68 pages). 



The collaborators to this book form a truly international company, including 

 many of the leading authorities in the field of developmental biology. 



The scope of many papers is wider than the title of the book suggests, i.e. 

 higher levels of organization than the purely chemical one are amply discussed. 



Literature references follow each paper. The book contains an index to 

 names of participants, and an extensive subject index. 



"RECHERCHES D'EMBRYOLOGIE EXPERIMENTALE" 



Vol. I, 1958 

 by B. Menkes Edit. Acad. Republ. Populare 



807 pp., 429 figs. Romine 



The present book is a collection of reports of investigations carried out by 

 a research group in experimental embryology at the Scientific Research Basis 

 of the Roumanian Academy in Timisoara, Roumania. The book is written in 

 Roumanian, but it contains a summary and a list of explanations of figures in 

 French, comprising 30 pages. This enables the interested reader to form an 

 idea about the character and the theoretical background of these investigations. 

 The latter is formed by the materialistic-dialectic doctrine and the ideas of its 

 scientific exponents. 



The investigations have been carried out exclusively on avian embryos. 

 Extensive methodological information is supplied. The principal research 

 objects have been the following: the development of "reactivity" of the embryo 

 and extra-embryonic organs (phagocytosis, hyperplasia, grafting, infection, 

 effects of surgery of the central nervous system); the biology of xenoplastic 

 skin grafts; the function of some embryonic organs (meso- and metanephros; 

 liver and yolk; heart and surrounding mesenchyme); certain developmental 

 correlations (between nutrition and respiration; between embryo and yolk sac; 

 between embryo and area vasculosa; significance of allantoic circulation and 

 sub-embryonic fluid). 



243 



