Meningococcus. 1, Differentiation between various strains of meningococci by means of agglutination and absorption of agglutinins tests [with bibliography], by C. T. Butterfield and M. H. Neill; 2, Tropin reactions of antimeningococcus serum [with bibliography], by Alice C. Evans; 3, Effect of freezing and thawing upon antibody content of antimeningococcus serum, by C. T. Butterfield; 4, Fermentation reactions and pigment production of certain meningococci [with bibliography], by Clara E. Taft; 5, Studies on lethal action of some meningococci on mice with special reference to protective properties of antimeningococcus serum [with bibliography], by M. H. Neill and Clara E. Taft.

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