interesting to the specialist but it is not clear what is the 

 purpose of including them in a book. Unfortunately, several con- 

 tributions of potential interest by less well-known investiga- 

 tors are in this category. 



From among the longer papers we single out the following as 

 being of possible interest to our readers: Induction of gluta- 

 mine synthetase in embryonic neural retina (Moscona, 24 pp.); 

 Cell-cycle-dependent events during myogenesis, neurogenesis, and 

 erythrogenesis (Holtzer et al., 14 pp.); RNA synthesis in giant 

 chromosome puffs (Pelling, 14 pp.); and Specific biological in- 

 hibitors of protein synthesis in differentiated cells (Kruh et 

 al., Paris, 12 pp.). Papers of less than ten pages deal with 

 ribosomal genes during amphibian oogenesis (Crippa and Tocchini- 

 Valentini), RNA transcription from single copy DNA during mouse 

 development (Church and Brown), and hormonal receptors of chro- 

 matin and their possible role in ontogenesis (Salganik et al., 

 Novosibirsk) . 



Several other papers, e.g. those by Bishop, Georgiev, and 

 Stenram (Sweden) are of interest to molecular biologists but not 

 specifically to developmental biologists. 



106. 



M.ROCKSTEIN and G.T.BAKER, III, eds. 1972. MOLECULAR GENETIC 



MECHANISMS IN DEVELOPMENT AND AGING 



Academic Press, New York, etc. XII, 254 pp., 83 figs., 31 tabs. 



$ 8.50 



Contributors: Baird, Blumenfeld, Chen, Clever, Lang, Massie, 

 Painter, Patel, Rockstein, Samis, Stidham 



This book contains the papers presented at a Symposium held 

 in Miami, Fla. in March, 1972. It is one of the first volumes 

 produced by Academic Press Rapid Manuscript Reproduction, and 

 the speed of publication is indeed remarkable. This was 

 achieved in part by the use of offset print, and no doubt also 

 by adequate urging of the participants to produce their manu- 

 scripts in time. 



The two editors, both from the convening Department of Physi- 

 ology at the Miami School of Medicine, are active in the study 

 of ageing processes in insects, and it would have been fair to 

 indicate in the title that all of the nine review and research 

 papers making up the book report on work done on insects. The 

 borderline between development and ageing is vague and almost 

 all papers are of interest to developmental biologists. They 

 deal with a variety of subjects ranging from the hormonal con- 

 trol of cellular growth and death via overall nucleic acid, pro- 

 tein, and enzyme biochemistry to molecular biology (examples of 

 the latter are satellite DNA and soluble DNA). One paper deals 

 with ovarian maturation, oogenesis and embryogenesis . Another 

 paper compares findings obtained in rodents with data on insects 



The book is well produced at a very reasonable price. 



227 



