The subject of this volume is to review chemical agents which affect blood and blood-forming organs. Significant ad- vances made over the past several years in the purification of several hematopoietic growth factors, such as erythro- poietin and colony stimulating factor; the availability of several other growth factors, such as the interleukins which are important in regulating the production of red blood cells, leukocytes, megakaryocytes and platelets are discus- sed. Numerous toxic chemical substances are being produced in our environment which people are exposed todaily causing a...