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Department of Genetics, University of
Wisconsin, Madison, Wisconsin, U.S.A.

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Department of Genetics #274 639 &. AGRI National Can-
cer Institute, Public Health Service, U.S.A., @## C-2157
33 kU Wisconsin Alumni Research Foundationi= £ 4 Research
Commitee of the Graduate School, University of Wisconsin
RAO YE Chron.

(1) Srocksr, B.A.D.:J.Hyg., 47,398(1949) (2) Zmper,
N.D., and Lepsrserc, J. : J. Bact., 64,679 (1952) (3) Je
i: ARES, 41.40301954) (4) Srocker, B.A.D., Zinpzr,
N.D., and Lapsrssrc, J.: J.Gen. Microbiol., 9, 410 (1953)
(5) Leperssrec,jJ., and Epwarps, P.R.: J.Immunol., 71,
231(1953) (6) Leprrperc, J., and ino, T. : Genetics, in

press (1956)
(1956 IX 19)