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technique which one would expect to be present in a treatment of dynamic nuclear orientation. This bias towards radio-frequency methods...
technique which one would expect to be present in a treatment of dynamic nuclear orientation. This bias towards radio-frequency methods and terminology does, however, not diminish the value of the book. E. KARLSSON
International Atomic Energy Agency, Production and Use o f Shortlived Radioisotopes from Reactors, Proceedings of a Seminar, Vienna, 5-9 November 1962, Vol. I and II, Vienna 1963, 432 + 272 pp. Price $ 8.50 and $ 5.50.
The use of radioactive isotopes enters into an increasing number of applications. Hitherto mainly isotopes with long halflives have been available. Certain types of problems are better solved by the use of more short-lived species and therefore it has been a trend to search for convenient production and preparation methods for such isotopes. The possibilities to use small research reactors have especially been studied. In the proceedings of the
IAEA seminar some of the experiences gained both in production, preparation and application have been summarized. The articles present important new results and give valuable information about the problems met within this field. The largest number of applications are given in activation analysis but uses in medicine, biology and industry have also been well exemplified. P. O. KINELL
FRANZ ALT and MORRIS RUBINOEF (editors), Advances in computers, Vol. 4 (Academic Press Inc., New York, 1964) 312 pp. US $12.00. Contents of Vol. 4: W. C. McGEE, The formulation of data processing problems for computers; D. R. BENNtON AND H. D. CRANE, All-magnetic circuit techniques; H. E. TOMPKINS, Computer education; H. H. GLAETTLI, Digital fluid logic elements; W. A. CURTXN,Multiple computer systems.
ERRATUM F. C a p p e l l a n i a n d G . Restelli, Construction and Performances of Silicon Barrier Detectors ( N u c l e a r I n s t r u m e n t s a n d M e t h o d s 25 (1964) 233). T h e f o r m u l a o n p a g e 233 m u s t be c o r r e c t e d t o : C -
p
1.8 x 104 - -
359
+ v0)
in p F / c m z.
T h e a b s c i s s a in fig. 10 m u s t be V -~ instead of V -1.