This volume is an encyclopedic compilation of useful facts and formulas, suitably clothed with an explanatory text, and brought together by Dr. William Siri and his colleagues at the University of California. It has been designed as a book intermediate in level between an elementary text for beginning biologists and an advanced handbook for experienced physicists. The coverage of the subject is so broad, however, that it will probably find readers in both these classes. It is primarily a laboratory manual for research which involves isotopes, either stable or radioactive. The laboratory facts are backed up by good discussions, both practical and theoretic, of the basic factors involved in good measurements.
In view of the rapid development of the cyclotron by the radiation laboratory of the University of California, the division of medical physics at the university has had an unparalleled experience in the use of radioactive isotopes in therapy.