Lis 56 Lumb 



LISON L. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue 



aux Laines, BRUXELLES. Belgique. 

 a. Photometric quantitative determinations of desoxyribonucleic acid 



(D.N. A.) in resting cells, mitosis, spermatogenesis and development (in 



collaboration with J. J. PASTEELS) 

 LITTLE, C. C. Sc.D., Prof. — Jackson Memorial Lab.. Box 558, BAR 



HARBOR, Me, U.S.A. (no data received on Nov. 1^', 1952) 



LITTRELL, J. L. Dr — Baxter Laboratories, MORTON GROVE, 111., 



U.S.A. 



a. Factors influencing regeneration of nerve fibers in the central nervous 

 system of adult animals. Felis domestica (Carnivora) and (Anthropoidea) 

 (in collaboration with W. F. WINDLE and E. G. STUART) 



b. Growth and regeneration of the severed spinal cord in embryos. Gallus 

 domesticus (Aves) (in collaboration with W. F. WINDLE and E. G. 

 STUART) 



LIU J C. B.S., Ph.D., Asst Prof. — Dept of Anat., School of Med., Univ. 

 ' of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. 

 a. Restoration of the intrinsic neurons following damage. 

 LOMBARD, G. L. Ph.D. — Zool. Inst., Fac. of Sci., Univ. of Pretoria, 

 PRETORIA, S. Africa. 



— Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, 

 Holland (until November 1952). 



a. Investigations into the effects of LiCl on the early development. Xeno- 

 pus laevis Daudin and Ambystoma mexicanum (Amphibia) 



b. Homoplastic transplantations of presumptive neural areas between 

 Lithium-treated and normal blastulae/early gastrulae, respectively. Tri- 

 turus, Ambystoma, Plemodeles (Urodela) 



LPVTRUP, S. Mag.scient. — Cytochem. Dept, Carlsberg Lab., 8 Gl. 

 Carlsbergvej, COPENHAGEN Valby, Denmark. 



a. Proteolytic enzymes during development. Ambystoma mexicanum 

 (Urodela) 



h. Metabolism (Oo-consumption) at different temperatures. Ambystoma 

 mexicanum (Urodela) 

 LUBCHENCO, L. M.D. — Dept of Pediatrics, Med. School, Univ. of 

 Colorado, 4200 East Ninth Ave, DENVER 7, Col, U.S.A. 



a. Study of developmental disturbances related to nutritional deficiencies 

 investigated by application of anti-vitamins and anti-animo acids to the 

 intact egg and to explants (somites). (Aves) (in collaboration with H. 

 HERRMANN, J. MACKENZIE and U. ROTHFELS) 

 LUDTKE, H. Dr, Prof. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- 

 BURG i.Brsg., Deutschland. 



a. Entwicklung der Sehleistung. Notonecta glauca (Heteroptera, Hemip- 

 teroidea, Insecta) 



h. Entwicklung der Sehleistung. Mus rattus (Rodentia) (gemeinsam mit 

 G. HERMANN) 



c. Entwicklung der Sehleistung. (Lepidoptera; Culicidae, Diptera) (gemein- 

 sam mit G. HAAS und P. BUTZ) 

 LUMB, Miss E. S. Ph.D. — Dept of Biol., Coll. of Arts and Sci., Univ. of 

 Rochester, ROCHESTER 3, N.Y., U.S.A. 



a. A cytochemical study of the nucleic acids in the differentiating spinal 

 nervous system. Gallus domesticus (Aves) 



