The larger part of this book has to do with a new international insulin standard. Establishment of the new standard became necessary because the old standard was used up. The new standard has an activity of 22 units per milligram. This makes no significant change in the value of the unit.
Considerable space is given to the discussion of gas gangrene antitoxin. It is shown that gas gangrene antitoxin can be assayed with a high degree of accuracy. It is recommended that the permanent commission on biologic standardization accept the dry stable preparation of gas gangrene antitoxin of the Statens Serum Institute, Copenhagen, as the international standard for this antitoxin and define a unit in terms of this standard preparation for international use.
It is recommended that the stable preparation of diphtheria antitoxin, #788, prepared at the Statens Serum Institute, Copenhagen, be accepted as the international standard for use in