1914] 



CROCKER 6* DA VIS— DEL A YED GERMINA TION 



299 



and a low total at the end of 96 hours, while nos. 7, 22, and 14 show 

 both a high rate and a high total. Table IV shows the elongation 

 of 20 embryos in 0.01 N HC1; and table V the elongation of 20 

 embryos in 0.001 N HC1. 



Table VI summarizes the results for the 20 seeds each in water, 

 0.01 N HCL and 0.001 N HCL and fisr. a uresents the results in 



form 



The percentage of elongation is platted on the 



time 



from 



elongation 



Time 



and 



Fig. 4. — Rate of elongation of Alisma Plantago embryos in water, 0.01 \" HC1, 



curves that the rate of elongation in water equals or exceeds that 

 in either solution at all times, and shows a great advantage over 

 both from 50 hours on. In the 0.001 N HC1 cultures, the rate of 

 elongation and the total elongation stands between that of water 

 cultures and the 0.01 NHC1 cultures. 



N/6000 HC1 

 in the form 



experiment was performed using water, N/3000 



summarized in 



/3000 



