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The administration of cow serum by feeding may replace colostrum. The agglutinins towards Bacillus abortus in it are absorbed during the first hours of life in relatively large amounts when compared with those naturally appearing in ordinary milk. It seems probable that colostrum is the most efficient transporting agent of the antibodies. Experiments are under way to put these conclusions on a quantitative basis with special reference to the age of the calf during which the absorption of homologous antibodies is still possible.

THE ABSORPTION OF SPECIFIC AGGLUTININS IN HOMOLOGOUS SERUM FED TO CALVES DURING THE EARLY HOURS OF LIFE