SOLOMON. J. B. Ph.D. — Chester Beatty Research Inst.. Fulham Rd.. 

 LONDON S.W. 3, England 

 a. Onset of immune mechanisms in young animals. Gallus domesticus (Aves) 

 SOMA, T. — Nat. Inst, of Animal Industry, CHIBA-shi, Japan 



a. Transplantation of fertilized ova by a non-surgical method. (Mammalia) 

 (in collaboration with K. OTSUKI and T. SUGIE) 



b. Storage and culture of fertilized ova. (Mammalia) (in collaboration with 

 K. OTSUKI and T. SUGIE) 



c. Fertilization of ova in vitro. (Mammalia) (in collaboration with 

 K. OTSUKI and T. SUGIE) 



SOROKIN. S. P. A.B., M.D. — Dept. of Anat, Harvard Med. School, 25 



Shattuck St., BOSTON 15, Mass., U.S.A. 

 SPIEGEL, Mrs. E. SCLUFER B.A., M.A., Ph.D. — Dept. of Biol. Sci., 



Dartmouth Coll., HANOVER, N.H., U.S.A. 



a. Protein changes in development. Rana pipiens, R. catesbiana (Anura) 

 (in collaboration with M. SPIEGEL) 



b. Role of enzyme induction in development. Rana pipiens, R. catesbiana 

 (Anura) (in collaboration with M. SPIEGEL) 



c. Biochemistry of metamorphosis. Rana pipiens, R. catesbiana (Anura) 

 SPIEGEL, M. B.S., Ph.D. — Dept. of Biol.Sci., Dartmouth Coll., HANO- 

 VER, N.H., U.S.A. 



a. Protein changes in development. Arbacia punctulata (Echinoidea) , Rana 

 pipiens, R. catesbiana (Anura) (in collaboration with Mrs. E. SCLU- 

 FER-SPIEGEL) 



b. Role of enzyme induction in development. Rana pipiens, R. catesbiana 

 (Anura) (in collaboration with Mrs. E. SCLUFER-SPIEGEL) 



SPINNER. W. Cand.phil. — Zool.-vergl. Anat. Inst., Naturwiss. Fak., Univ. 

 Zurich. Kiinstlergasse 16, ZURICH, Schweiz 

 a. Investigation of biochemical pathways in the development of X-ray in- 

 duced eye-color mutants. Culex pipiens (Diptera) 



SPIRITO. A. Dott, M.I.I.E., Prof. — 1st. di Biol, gener., S. Pietro, PERU- 

 GIA, Italia 

 a. Origine e natura dei tumori. Bufo spec. (Anura) 



SPISAK (PLONKA), Mrs. I. M.Sc. — Dept. of Biol, and Embryol., Acad, 

 of Med., ul. Kopernika 7, KRAK6W, Poland 

 a. Experimental induction of immunological tolerance in embryos and adult 

 animals. Transfer of immunological tolerance to Fi generation. Mesocri- 

 cetus auratus, Mus musculus, Rattus spec. (Rodentia) (in collaboration 

 with Mrs. A. SKOWRON (CENDRZAK) and K. ZABlNSKI) 



SPOFFORD W R. Ph.D., Prof. — Dept. of Anat., School of Med.. State 

 Univ. of New York, 766 Irving Ave., SYRACUSE 10, N.Y., U.S.A. 



a. Induction and determination in the neural plate. Ambystoma maculatum 

 (Urodela) 



b. Experimental neurogenesis. Ambystoma maculatum (Urodela) 

 SPRATT, N. T., Jr. A.B., Ph.D., F.I.I.E., Prof. — Dept. of Zool., Coll. of 



Liberal Arts, Univ. of Minnesota, MINNEAPOLIS 14, Minn., U.S.A. 



a. Investigating the nutrient requirements essential to morphogenesis and 

 growth in the early stages of development (pre-streak and streak blasto- 

 derms). Gallus domesticus (Aves) 



b. Survey of dehydrogenase enzymes in early embryos. Gallus domesticus 

 (Aves) 



153 



