1. H. G. Kunkel, personal communication.
2. The Influence of Adjuvants on the Elimination of Soluble Protein Antigens and the Associated Antibody Responsesi
3. For complete conversion to the γ-modification, the product is allowed to stand for several weeks in the refrigerator. It is used usually after ripening for 3 months, but the process of ripening appears of questionable value for adsorption of protein antigens.