1904.] 



PUBLIC DOCUMENT — No. 33. 



19 



Table IV. — Shoiri7ig the Effect of Current Electricili/ upon (he Groirth 

 of ]>ndishes (llaphamts sativus L.). Normal I'hinls taken as the 

 Standard at 100. 



[Duration of experiment, 38 days.] 



No. 



Treatment. 



Nuiiilti'i 



of 

 I'laiits. 



11 



VI 

 13 



Normal, 



Direct current; one jrravity 

 cell; ct>i>)ier jilate elec- 

 trodes 



Atniosplieric electricity ; cop- 

 per plate electrodes," . 



Copper and zinc plate elec- 

 trodes, connected, 



291 



2i)4 

 281 

 289 



Total 



Percent. 



(gained. 



>7.89 

 28.13 

 45.28 



Total average weijjrlit, in grams : - 



Ofruotf! 



Of tops, .... 

 Of whole plant. 



1 Loss. 



Per Cent. 

 Normal. Treated, gained. 



3.0!) 2.93 1 5.50 



2.74 4.17 52.19 



5.83 7.10 21.78 



Table Y. — Showing the Effect of Current Electricity vpon the Growth 

 of liadishes (^Rajihfmns satirns L.). Normal I'htnts taken ccs the 

 Standard at 100. 



[Duration of experiment, 40 days.] 



1 Loss. 



„ , Per Cent. 



Total average weight, in grams:- Normal. Treated, gained. 



Of roots 3.29 3.78 14.86 



Of tops 4.02 4.03 .02 



Of whole plant 7.31 7.81 6.84 



The experiments shown in tables ITT., IV. and Y. fol- 

 lowed one another in succession, and were conducted in a 



