Biochemistry 



31. Detection of collagen in embryos in microgram amounts. (Amphibia) 

 Edds, M. V., Jr. — Proc. Nat. Acad. Sci. 44, 296-305, 1958 



See also entry no. 26 



Biophysics 



32. A magnetic method for measuring the forces which the neural folds can 

 exert towards closure. (Amphibia) 



Selman, G. G. — J. Embryol. exp. Morphol. 6, 448-456, 1958 



33. Intrauterine irradiation as a tool of including immunological tolerance. 

 Lengerova, A. — Folia Biol. 3, 321 and 333, 1957 (Mammalia) 



See also entry no. 27 



Development and Genetics 



Histology and cytology 



34. Chromosome analyses of normal and malignant cells. (Mammalia) 

 Makino, S. & M. Sasaki — Jour. Nat. Cancer Inst. 20, 3, 465-487, 1958 



See also entry no. 8 



Operation and marking 



See entry no. 13 



Culturing (of organisms, organs, tissues and cells) 

 See entries no. 18, 34 



Histochemistry and cytochemistry 



See entry no. 8 



Biophysics 



35. An ultra-violet light method for producing haploids. (Amphibia) 

 Selman, G. G. — J. Embryol. exp. Morphol. 6, 634-637, 1958 



36. Production of auto- and allotetraploids and diploid-tetraploid mosaics 

 by a shock of supersonic waves. (Urodela) 



Kawamura, T. & Y. Utsunomiya — J. Sci. Hiroshima Univ. 17, 1-12, 1957 



221 



