position in the mechanism of biological protection against infections, but the marked development of chemotherapy in recent years has produced a tendency to ignore the factors of a living organism in the therapy of infections. On the other hand, wide-spread use of chemotherapeutics has produced problems of resistance and cross-infections. It has become possible to make quantitative examination ...

The importance of the reticuloendothelial system in relation to neoplasms has been recently brought into focus by a group of Soviet workers. According to Shimkin (18), blockading of the reticuloendothelial system has been used by Roskin (16) as a means of growing heteroplastic tumors. Bogomolets (3) has reported the effect of specific antireticular cytotoxic serum (ACS) on the genesis, survival...