Micrurgy is a basic technic adapted to the manipulation and observation of microscopic objects, animate or inanimate. With this definition, the first chapter of the symposium edited by James A. Reyniers begins a description of this technic as it is applied, first, to surface chemistry and the study of living cells, second, to botany, and then, with the development of the "germfree system," to the study of living animals, including the mammalian fetus.
Much of the technical and even of the theoretic aspects of the problem is beyond the scope of interest of the average medical reader. However, the description of the "germ-free" system as developed at Notre Dame, by which animals may be reared for as long as six months under these conditions, is most interesting. Such methods have been carefully and ingeniously planned and offer opportunities for the study of many problems.
Of special interest to pediatricians is