Hillem 43 Hoffm 



d. Flame photometric analysis for Na, K and Ca in the placenta throughout 

 gestation. Cricetus auratus (Rodentia) 



e. Flame photometric analysis for Na, K and Ca from birth to the adult 

 condition. Cricetus auratus (Rodentia) 



f. Attempts at regeneration. Mus norvegicus albinus (Rodentia) 



g. Experimental analysis of the development of the visceral skeleton and 

 columella auris in the embryo. Callus domesticus (Aves) 



h. The effects of supplements of vitamins A and E on the litter size. Cricetus 



auratus (Rodentia) 

 j. Glycogen studies in the fetal liver (and other tissues). Cricetus auratus 



(Rodentia) 

 k. Studies on glycogen, fat, iron and the cell types in the placenta. Cricetus 



auratus (Rodentia) 

 1. The effects of simple interference on the development and hatchabihty. 



Callus domesticus (Aves) 

 m. Attempts at nutritional prevention and remission from experimentally 



induced benzpyrene cancer. Cricetus auratus (Rodentia) 

 HILLER, S. M.D. — Inst, of Histol. and Embryol., Med. Acad., GDANSK, 



Poland. 



(no data received over this year) 

 HINTZSCHE, E. Dr Med., Prof. ord. — Anat. Inst., Buhlerstr. 26, BERN. 



Schweiz. 



a. Anorganischer Stoffwechsel, Fermentchemische Untersuchungen. Homo 

 and (Mammalia) 



b. Experimentelle Studien uber Zellvermehrung in Gewebekulturen. Ein- 

 wirkung fordernder und hemmender Substanzen. Callus (Aves), Orycto- 

 lagus cuniculus (Rodentia), Homo (Primates) 



HJELMMAN, G. M.D.. Prof. — Dept of Anat., Fac. of Med., Univ. of 

 Helsinki, HELSINKI, Finland, 

 (no embryological work in progress) 



HOESSELS, Miss L. — Hubrecht Lab., Internat. Embryol. Inst., Janskerk- 

 hof 2, UTRECHT, Holland, 

 a. Analysis of the neural induction. Transfer of activating substances in 

 horizontal direction through folds of presumptive gastrula ectoderm and 

 subsequent organisation of a nervous system, (heteroplastic implantation 

 of presumptive gastrula ectoderm in gastrulae and neurulae) Triturus 

 taeniatus, alpestris and cristatus and Amblystoma mexicanum (Urodela) 

 (in collaboration with P. D. NIEUWKOOP, Miss E. BOTEREN- 

 BROOD Miss A. KREMER, Miss F. F. S. N. BLOEMSMA, Miss 

 C. LINGBEEK, G. MEYER. F. J. VERHEYEN and J. WILLEM- 

 SEN) 



HOFF— JoRGENSEN, E. — Laboratory of Zoophysiology. Nat. Sci. Fac, 

 University of Copenhagen, Juhane Mariesvej 32, COPENHAGEN 0, 

 Denmark. 

 a. Determination of desoxyribonucleic acid in eggs and embryos, evidence 

 of cytoplasmic desoxyribosides. (Amphibia) (in collaboration with 

 E. ZEUTHEN) 



HOFFMAN, H. B.A., M.A. — Dept of Zool., Univ. of California, LOS 

 ANGELES 24, Cal., U.S.A. 

 a. Electrophoresis of hver extracts during development and carcinogenesis, 

 (in collaboration with A. M. SCHECHTMAN) 



