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MISSOURI AGR. EXP. STA. RESEARCH BULLETIN NO. 21 



dered, or counteracted to some extent, the destructive processes 

 which were initiated by freezing. (It should be mentioned that all 

 seeds of a given variety were soaked at one time. One-third of the 

 entire lot were allowed to germinate without further treatment, 

 while the remaining two-thirds were frozen. Of these frozen seeds, 

 one-half were allowed to germinate while the remainder were ether- 

 ized before placing them under conditions suitable for germination). 



TABLE 14 PERCENTAGE GERMINATION OF SEEDS OF DIFFERENT SPECIES 

 TREATED IN VARIOUS WAYS 



A Zea, Mays, L. 



B Phaseolus lunatus, L. 



C P. vulgaris, L. 



D Citrullus vulgaris, Schrad. 



E Cucurbito maxima, Duchesne. 



F Spinacea oleracea, L. 



G Raphanus sativus, L. 



H Hibiscus esculentus, L. 



I Allium cepa, L. 



Results similar to those given in the above table were obtained 

 when seeds were allowed to soak for six instead of three hours. The 

 experiments with seeds are of interest because they suggest a very 

 interesting effect of etherization. 



E. INFLUENCE OF VARIOUS AGENTS ON THE 

 REST PERIOD OF PLANTS 



In connection with each experiment which has been described 

 in the foregoing pages, some treated and some untreated twigs were 

 placed in beakers containing water and put in the greenhouse where 

 they were allowed to grow. The time when the buds opened was 

 noted in all cases. 



The results in general were similar to those obtained by previous 

 investigators. It was found that during the very early part of the 

 dormant season, the rest period was not so easily broken as later 



