128 AGRICULTURAL EXPERIMENT STATION. [Jan. 



1887. — The experiment was repeated upon the same 

 lands, with but a slight modification. The soil was ploughed 

 and fertilized, as in the preceding year. Ten plats, each fifty 

 feet long, were planted with four rows of potatoes, three feet 

 three inches apart, and with nineteen hills in the row. 

 Medium-sized, whole scabby potatoes (Beauty of Hebron), 

 selected from the crop raised upon our own fields during the 

 previous year, and which is described in some preceding 

 pages under the heading "Potato Experiment, A," served 

 as seed potatoes. One-half the plats were planted with 

 scabby potatoes, all from the same lot, after being immersed 

 for eighteen hours in some solution prepared for that pur- 

 pose ; and the other half were planted without any previous 

 treatment of the seed, — plats 2, 6 and 10 with our scabby 

 potatoes. Beauty of Hebron, and plats 4 and 8 with healthy, 

 smooth tubers, of the same variety. 



Scabby potatoes, soaked in a solution of potassium sulphide. 



Scabby potatoes, without any particular treatment. 



Scabby potatoes, treated with a solution of hypochlorite of 



lime (bleaching lime) . 

 Smooth, healthy potatoes, without previous treatment. 

 Scabby potatoes, treated with a solution of potassium chloride 



(muriate of potash). 

 Scabby potatoes, without previous treatment. 

 Scabby potatoes, treated with a solution of carbolic acid. 

 Smooth, healthy potatoes, not treated. 



Scabby potatoes, treated with copper sulphate (blue copperas) . 

 Plat 10. Scabby potatoes, not treated. 



The young plants made their appearance on all plats, ex- 

 cept plat 9, June 1 ; those on plat 9 appeared eight or ten 

 days later. The entire crop looked uniformly well. The 

 vines dried up on all plats at about the same time. The 

 crop was harvested with the following results : — 



