Any professional concerned with immunology will be interested in this book dedicated to the memory of Milan Hasek, former director of the Prague Institute of Experimental Biology and Genetics. Prof. Hasek was a congenial scientist and most amiable person - a personal friend of almost all leading immunologists around the world. He was displaced from his post of director in 1970, yet had a lasting impact upon his students and the group known as the Prague School of Immunogenetics. The topics covered in the contributions range from tolerance, immune network, and immunogenetics to the immunology...

Trials in the treatment of the leukemias are sometimes based on a hypothesis, as in the case of exchange transfusion 33] or the use of antimetabolites 86]. Or they are conducted empirically as the results of chance observations, as in the case of the use of the nitrogen mustards, urethane, and the Vinca alkaloids. Or they lie between the two, aiming at making use of well established biological facts: examples are the use of ACTH, cortisone and, more recently, the antibiotics. What is true for bacteria may also perhaps be true, if not for elephants, at least for the malignant cells of...