brief introduction by the editor, which places the papers in the propei 

 perspective. The majority of the papers deal with animal material; one each 

 bears on plant material, bacteriophages, and bacteria, respectively. 



The four sections are entitled respectively: "The multipotential genome" 

 (papers by Gurdon and Uehlinger, Vasil and Hildebrandt, and Moscona), 

 "Selective gene expression" (papers by Edgar and Wood, F. Jacob and 

 J. Bonner), "Egg cell organization" (papers by Morgan and Spooner, and 

 Curtis), and "Cell interactions: physical and chemical" (papers by Trinkaus, 

 Grobstein, and J. J. Gilbert). The two longest papers cover 14 pages each; 

 all but one date from the years 1957 — 1966; that by Morgan and Spooner 

 dates from 1909. The paper by Gilbert on trans-generic induction of spines 

 in rotifers, although it is indeed delightful, seems a little out of place in a 

 small collection like this. 



The papers are reprinted in uniform type. The photographic illustrations 

 are reproduced as such, but the other figures have all been redrawn, un- 

 fortunately with little care. The editor has added a few explanatory diagrams 

 and drawings. The book is concluded by a brief list of further reading. 



16 EMBRYOLOGIE 

 Travaux pratiques et enseignement dirige 



Vol. 1 (2nd edit., 1968) 

 Vol. 3 (1968) 

 Vol. 1 by G. David & P. Haegel Masson & Cie 



114 pp., 226 figs. Paris 



Vol. 3 by M. Auroux & P. Haegel Price Vol. 1: F 30.— 



146 pp., 257 figs. Price Vol. 3: F 38.— 



(paper-bound) 



In France embryology is at present taught to medical students in a three- 

 year course. This series of three atlases has been designed to assist the 

 student along with the practical courses given in Paris. The second volume 

 was not available for review. The three volumes respectively deal with: 

 (1) embryogenesis, (2) general organogenesis, and (3) development of the 

 nervous system, sense organs, and endocrine glands. 



The text of the atlases is brief, the emphasis being on the illustrations. 

 These consist of photographs, drawings, and diagrams, all three types of 

 illustrations being of superb quality. Colour is used judiciously in almost all 

 drawings and diagrams. The organization of the books is didactically very 

 clear. Adequate attention is given to developmental anomalies and to foeto- 

 maternal relationships. Data from experimental and comparative embryology 

 are briefly treated to clarify certain relationships. 



The plan and execution of the series is such that teachers of human 

 embryology in all countries might derive various new didactic ideas from 

 them. 



17 A MODEL ATLAS OF THE TEN MILLIMETER PIG 



1967 



By E. S. Hegre Med. Coll. of Virginia Book Store 

 546 looseleaf cards, Richmond, Va. 



cut and bound Price: $ 49. — 



This is a very unusual "book". It consists of a stack of more than 500 cards, 

 nearly 7 in. high; each card carries the image of a serial cross section of 

 a 10 mm. pig embryo at a magnification of x 16; the sections are cut out so 

 that one (lateral) half protudes beyond the border of the card; together all 

 sections stacked in this way build up the surface rehef of one half of the 



318 



