Phenols. 1, Phenols as preservatives of antipneumococcic serum, pharmacological study [with bibliography], by Carl Voegtlin; 2. Nature of contaminations of biological products, by I. A. Bengtson; 3, Studies in preservatives of biological products, effects of certain substances on organisms found in biological products, by M. H. Neill; 4. Effect of ether on tetanus spores and on certain other microorganisms, by H. B. Corbitt.