150 Dr Fyfe's Experiments on Electro-Culture. 



size or produce — a few of them were good in both parts of 

 the bed, but, in general, they were small. 



POTATOES. 



16M June. — The potatoes at K L of plan were hoed up 

 on the 12th ; and, on the 16th, a copper and zinc plate were 

 sunk in the ground, at the distance of six feet, and con- 

 nected with each other by a wire kept about 2^ feet above 

 ground, and out of contact with the stalks. 



2dd. — Observed no difference between the galvanized and 

 non -galvanized rows. 



5M July. — No observable difference ; tubers of the size 

 of a pea, at different stems in different rows. 



20M.— No difference. 



1^/ August. — Tubers enlarging, apparently, in the same 

 way in all the rows. 



Ibth. — Potatoes ready for use ; at this time raised two 

 stems from different rows indiscriminately, and weighed 

 them ; and did the same on the 17th. The following is the 

 result : — 



G. 



2. 3. 6. 7. 8. 



August 15. ... 15 J m 



17. 13 J 22 18 18 



3 is the galvanized row. 



Thus four stems of the galvanized row yielded 37^^ oz. ; 

 and eight from the non-galvanized gave 67, that is, 33^ for 

 the four stems. Here there is a slight difference in favour of 

 the galvanized row. 



This crop was very deficient as to produce. 



23c? June. — The plot P Q R on plan was sown with early 

 kidneys at the usual time ; those marked from 1 to 5 inclu- 

 sive being sown a little later than those marked 6, 7. Of 

 these rows, Nos. 3 and 6 were subjected to the action of a 

 galvanic current. For this purpose, a diaphragm battery, 

 consisting of a copper trough, presenting 70 inches of sur- 

 face, with a zinc plate, 6 inches by 4, was used ; the bag 

 containing the zinc being filled with salt and water. The 



