Dr Fyfe's Experiments on Electro-Culture. 151 



connecting wire of the plates attached to No. 6 was passed 

 along one side of the row of potatoes to the distance of ten 

 feet, then made to cross them, and then brought up on the 

 other side. With this wire, which, in this case, was above 

 ground, and in contact with the stalks, there was connected 

 a galvanometer, to ascertain when the current of electricity 

 ceased. When this was observed, the salt solution was 

 renewed, and in this way the action was continued, renew- 

 ing the solution from time to time as required, till the middle 

 of August. 



A similar adjustment was followed with No. 3, with this 

 difference, that the wire extended to the distance of 20 feet 

 along the row, and was sunk in the ground near the roots ; 

 the action was kept up as in the other for the same time. 



5t/i July. — Tubers observed at all the rows. 



26//«. — Began to use the potatoes, and continued to do so, 

 occasionally raising two stems from the rows, and weighing 

 them. The following is the result in ounces, Nos. 3 and 6 

 being the galvanized rows : — 



G. G. 



1. 2. 3. 4. 5. 6. 7. 



July 2^, 



August 2. 



21. 



21 20i 17J 19i 19 46i 51J 



Thus six stems of the galvanized of those first planted 

 (No. 6), yielded 46^, while the same number of the non- 

 galvanized gave 51^. 



Of those later planted, four of the galvanized row (No. 3) 

 yielded 17|, while 16 of the non-galvanized gave 80, that is, 

 20 for the four stems. 



In this trial, the difference is against the galvanized rows. 

 Taking the produce of the galvanized rows of both, it is 64 ; 

 of the non-galvanized, it is 71^. Taking the conjoined results 

 of all the trials — that is, seven stems galvanized, and seven 

 non-galvanized— they are as 101^ for the former, and 105 

 for the latter ; a difference so trifling, as to b6 altogether 

 unworthy of notice. 



