1899.] PUBLIC DOCUMENT — No. 33. 79 



all has ])een corrected. Such correction, in our experience, 

 always proves unduly favorable to the varieties of which we 

 have the least seed. Our effort has always l^een to obtain 

 just three pounds of each variety ; but sometimes we are 

 unable to obtain so much, or it may be that some tu])ers 

 obtained prove unfit to plant, owing to bruising or decay. 



The yield this year has varied from 8.5 to 46.7 pounds of 

 merchantable tul)ers for 40 sets.* Six varieties have given 

 a yield of 40 pounds or above of merchantable tubers from 

 40 sets, viz.. Ford's No. 31, 46.7 ; Early Minnesota, 44.7 ; 

 Champion of the World, 41.8; Burr's No. 1, 40.8; and 

 American Wonder and Early Dawn, 40 each. Eight va- 

 rieties gave under 20 pounds from 40 sets, viz., Lady 

 Finger, 8.5; Mayflower, 13.9; Salzer's Earliest, 14.2; 

 Potentate, 15.3 ; Mills's Long Keeper, 16 ; Livingston's 

 Pinkeye, 16.8 ; and King of the Earliest and White Beauty, 

 18.5 each, 



2. Test with Twenty-Jive Varieties (the Best of Last 

 Season). — The seed of these varieties, it will be under- 

 stood, was all of our own growing, and was of most excellent 

 quality. It was prepared for planting as above described, 

 and was planted upon similar soil and similarly manured. 

 One hundred sets of each variety were planted on May 13. 

 These varieties were sprayed six times, as were those in 

 the preliminary test. They, however, showed considerable 

 blight, and doubtless gave diminished yields because of this 

 affection. The yields have been calculated to 40 sets, to 

 make them comparaljle with the varieties in the other test. 

 These are shown in the table followino^ : — 



* Forty pounds for 40 sets corresponds to a yield of 242.4 busheks per acre. 

 Thirty pounds fur 40 sets corresponds to a yield of 181.8 l)usliels per acre. 

 Twenty pounds for 40 sets corresponds to a yield of 121.2 bushels per acre. 



