30 



TABLE XVIII. 



EiFe.ct of hourly stimulation upoa the growth of radicles of 



HOUSE BEAN (VICIA FABA) . 



Having repeated the above experiment several times and obtained 

 in each case practically the same results, it has been thought sufficient 

 to publish but one tab'e which is a fair representation of the results 

 ■of the ex])eriments carried out in this line. 



In this table it will be noticed that in the first twi'lve hours the 

 gain by treatment is not so great as at subsequent periods, a fact 

 which ha> been seen in all of our other experiments in this line but 

 the cause of which hns not been fully ascertained. Along this same 

 line were conducted some experiments upon the growth of the hypo- 

 cotyls where they were subjected to hourly electrical stinuilatii n. 

 For this woik the apparatus shown in Figure 4, which has been pre- 

 viously described, was used. 



In each pot seven seeds of th? White lupine (Lapinus albus) were 

 sown. These were stimulated hourly, for a period of al out thirty 

 seconds at each treatment, for fourteen days, with the same strength 

 of current as was u>ed in the foregoing ex[)erimcnt. Measurements 

 were then taken of a 1 the hypocotyls in each pot and an average 

 made which is given in the following table : 



TABLE XIX. 



Effect of hourly stimulation upon the growth of stems (hypocotyls 

 ■and epicotyls) 



OF WHITE LUPINE (LUIMNUS AL15US) . 



Treated. Untreated. Gain iiercent 



by treatment. 



Average growth 18.52 ir).13 "J2.4U 



This experiment, as do otliers which have been made but which 



