TECHNIQUE 571 



Ultra-Violet Photography- 

 Lucas and Stark, 1931. 

 EUenhom, Prokofieva and Muller, 1935. 

 Caspersson and Hammarsten; 1935. 



Screen Projection 



Darlington and Osterstock, 1936. 



Mitosis in Tissue Culture 



Hearne, 1936. 



Centrifuging 



Beams and King, 1935. 

 Kostoff, 1935. 



X-ray Treatment 



1. Organisms 

 Stadler, 1931. 



Muller, 1934 ' ^^ ^^^^> 1935- 

 Timofeeff-Ressovsky, 1934 '> ^^ ^^^^' i935 



2. Chromosomes 



Mather and Stone, 1933. 

 Mather, 1934. 

 Katayama, 1935. 

 Catcheside, 1935. 

 White, 1935. 

 Levan, 1935 h. 

 Riley, 1936. 



