24 



HATCH EXPERDIENT STATION. 



[Jan. 



In the two preceding tables are shown the results of elec- 

 trical treatment u})()n lettuce. The current was set at .2 

 niilHaniperes in exi)ermients 23 and 2(i, and at .4 inilliain- 

 peres in experiments 24 and 27. The experiments in l)oth 

 tables show the effect of electrical treatment, and where the 

 resistance was modified the results are tolerably uniform. 

 The gain by all treatment is 16.2'J and 54.52 per cent, 

 respectively. 



Table X. — Showing the Effect of Current Elcrtricity upon the Grnicth 

 of Lettuce (^Lactucd saliva L.). Normal Plants taken as the Stand- 

 ard at 100. 



[Duration of experiment, 5(1 days.] 



No. 



Treatment. 



Nnmber 



of 

 Plants. 



Per Cent, 

 gained 



in 

 Weight. 



2',) 



30 

 31 



Xormal, 

 Direct current. 



Atmospheric electricity, . 



Copper and zinc plate electrodes, 

 connected 



24 

 23 

 23 

 24 



3.06 

 32.14 

 11.13 



Total average weight, in grams: — 



Normal, 25.79 



Treated, 29.24 



Total per cent, gained, 13.37 



Taule XI. — Shoiving the Effect of Current Ekclricitii iijxm the (innr/h 

 of Jjettuce (^Lactuca sativah.). Normal Plants takxn as the Stand- 

 ard at 100. 



[Duration of experiment, 60 days.] 



Total average weight, in grams : — 



Normal, 29.,5S 



Treated, 43. Si 



Total per cent, gained, 4S.10 



