The Two Forms of Glicine. 



25 



courtesy of Dr. Erwin F. Smith. The plants were X-rayed by 

 the modern methods, using hard rays. Preliminary experiments 

 have shown that with the technique employed normal plants 

 were not disturbed by the X-rays in their growth and develop- 

 ment. Preliminary inoculation with the Bacterium tumefaciens 

 have also shown that the inoculations were uniformly successful 

 and were followed by the development of a large crown gall. 

 43 plants were inoculated with the microorganism and the inocula- 

 tion was followed immediately by X-ray treatment. The treat- 

 ment was given to each plant 6 times in the course of 2 weeks at 

 intervals of 2 days. Simultaneously with the X-rayed plants, 

 control plants of the same age and size were inoculated with the 

 microorganism from the same subculture. All the control plants 

 developed a large crown gall, the majority of the X-rayed plants 

 on the other hand developed no growth, and only a slight swelling 

 appeared at the place of inoculation. In 10 plants there developed 

 a small stunted growth. 



The microscopical study of X-rayed galls, a full report of 

 which will be given later, indicates that the main immediate 

 action of the X-rays on the cells of the crown gall consists not in 

 a direct destruction of the cells, but in the arrest of the proliferating 

 power. The analysis of the mechanism of the action of the 

 X-rays on the crown gall seems to indicate at the same time 

 that the rays influence and inhibit the functions of the cells 

 directly and do not destroy the bacteria. But this phase of the 

 subject will also be discussed in greater detail in a subsequent 

 publication. 



123 (1301) 

 The two forms of glycine. 

 By K. George Falk and Kanematsu Sugiura. 



[From The Harriman Research Laboratory, The Roosevelt Hospital, 



N. Y.] 



The two forms of glycine, plates from water, and needles from 

 alcohol and water, were studied. 



Emil Fischer 1 had shown that an acid chloride could be ob- 



1 E. Fischer, Ber., 38, 2914 (1905). 



