20. Kulturmethode. (Bryozoa ectoprocta) 

 Schneider, D. — Biol. Z. bl. 78, 250-283, 1959 



21. Culture of cellular components of thymus. (Vertebrata) 



Papp, E. & W. G. Venzke — Zentr. bl. f. Veter. med. 4, 291-304,1958 



22. A culture medium and method for embryonic cells in vitro. (Amphibia) 

 Barth, L. G. & L. J. Barth — J. Embryol. exp. Morphol., 1959 



23. A simple method for embryo and organ culture. (Amniota) 

 Vakaet, L. & J. Pintelon — C. R. Soc. Biol., 1959 



24. In vitro culture of early embryos, followed by transfer to uterine foster- 

 mother for subsequent development. (Mammalia) 



McLaren, A. & J. D. Biggers — Nature 182, 877-878, 1958 



See also entry no. 9 



Physiology of Development 



Microscopy, photography and reconstruction 



See entry no. 3 



Culturing (of organisms, organs, tissues and cells) 



See entry no. 24 



Physiology 



25. Modified apparatus for measurement of heavy water concentration by 

 falling drop. (General) 



Zotin, A. I. — Dokl. Akad. Nauk S.S.S.R. 121, 5, 948-951, 1958 



26. A method for the incorporation of radioactive isotopes in the egg. 

 Nakano, E. & A. Monroy — Experientia, 13, 416, 1957 (Echinoidea) 



27. Gastrular arrest by oxygen at atmospheric pressures. (Amphibia) 

 Malamed, S. — Exp. Cell Res. 13, 391-394, 1957 



28. Wachstumsbeeinflussung. (Aves) 

 Tisna-Amidjaja, D. A. — Roux' Arch. 150, 655-688, 1958 



Histochemistry and cytochemistry 



29. Histochemical detection of unsaturated fatty acids. (Annelida, Gastro- 

 Hess, O. — Exp. Cell Res. 16, 452-455, 1959 poda, Amphibia) 



30. Localization of /?. glucuronidase. (Aves) 



Billett, F. & L. Mulherkar — J. Embryol. exp. Morphol. 6, 52-56, 1958 



See also entries no. 3, 8 

 220 



