1. recommend that any doubtful reaction obtained by the Harrison-Wyler modification should be sub-;Harrison; Osmond,1943
2. Albrecht, B. (1942). Z. Hyg. Infektkr., 124, 284.
3. J. Iowa State jected to the Richardson modification, which med;Barnes, M.E.; Borts, I.H.; Miller, C.I.; Spanswick, M.;Pearl,1943
4. is said to weaken non-specific reactions and strengthen specific ones. Further, such sera should;the Kahn Verifica-Bertolozzi, M.;Gior. Batt. Immun,1934
5. Boas, H., and Neergaard, I. C. (1934). Hospitalstidende, 77, 1439.