The history of science is mostly written retrospec- tively, a generation
or two after the actual events being discussed. Science historians are
now analyzing and evaluating the origins of evolutionary and genetical
theory in the nineteenth century and a sort of "Darwin industry" seems
to have grown up. A history of mammalian cytogenetics by one of the main
participants is, hence, a very welcome change, since it has a vividness,
an immediacy and a personal flavor which these scholarly tomes and the
official biog- raphies of scientists mostly lack. The life of the
author, Chinese-born, T. C. Hsu, has been a romantic and color- ful one,
and he is himself a unique personality, so that his book is a very
unusual blend of reminiscences, history of his special field (which has
transformed human genetics) and wise comments on the mistakes made along
the way. The best qualities of a very fine Chinese mind have contributed
to Dr. Hsu's career, including this book. Those qualities (which seem to
me especially Chinese) include a kind of transparent honesty, a very
direct em- pirical approach to problems and superb technical ability.