1889.] 



PUBLIC DOCUMENT— No. 4. 



535 



Beauty of Hebrok. 



A careful consideration of these results tends to show that 

 a certain condition of the soil has been the leading cause for 

 the origin and propagation of the scab ; for scabby seed 

 potatoes have produced healthy, smooth tubers, both with 

 and without any special previous treatment (see plats 1, 2, 

 7 and 8). . On the other hand, it is not without interest to 

 notice that plats 1, 3 and 7 have furnished us with some of 

 the best potatoes we have raised during the past season. 



1888. — The field occupied by the experiment was the same 

 as during the preceding year. The same arrangement of 

 plats was adopted. The preparation of the soil, as far as 

 ploughing and manuring are concerned, was the same as jn 

 the preceding season. The solutions of chemicals for the 

 treatment of part of the seed potatoes was identical witli that 

 of the preceding year. All the details of the field work, be- 

 ginning with planting and ending with harvesting, were 

 closely corresponding to the course pursued in 1887. 



The potatoes were planted May 9 ; the vines died on all 

 plats, apparently without any exceptional external cause, 

 between August 23 and 31. No marked difierence could be 

 noticed in the appearance of the potatoes from the various 

 plats. All plats had produced some scabby potatoes. The 



