EXPERIMENTS WITH POTATOES. 



151 



mined chemically and that found by the specific gravity method. 

 Number 3036 has the lowest specific gravity of any of the sam- 

 ples examined, and 3053 has the next to the highest. Number 

 3036 carries 16.94 per cent while 3053 has only 16.26 per cent. 

 As found by specific gravity, 3036 would have only ten per cent 

 of starch and 3053 would have over twenty per cent. In the 

 table which follows the samples are arranged according to their 

 specific gravities. 



TABLE SHOWING ABSENCE OF RELATION BETWEEN SPECIFIC GRAVITY 

 AND STARCH CONTEST OF POTATOES. 



Sarnple number. 



It 

 > 



X S) 



>> 







3036 



1.0604 

 1.0742 

 1.0745 

 1.0795 

 I. 0803 

 1.0804 

 1.0852 

 1.0867 

 1.0881 

 1.0904 

 1.0906 

 1.0921 

 1.0967 

 1.1058 

 1.1120 

 1.1129 



% 



10.1 



12.7 



12.9 

 13.8 

 13.9 

 13.9 

 15.0 

 15.3 

 15.6 

 16.1 

 16.2 

 16.4 

 17.5 

 19.4 

 20.7 

 20.9 



% 

 16.94 



3039 



20.38 



3052 



18.63 



3037 



18.59 



3044 



15.96 



3055 



17.07 



3040 



19.20 



3038 



19.96 



3051 



18.62 



3041 



18.63 



3047 



18.12 



3046 



IS. SI 



3054 



18.03 



3045 



19.31 



3053 



16. "6 



3050 



IS. 14 







EFFECT OF SPRAYING UPON THE STARCH CONTENT OF POTATOES. 



As before stated, this investigation was begun with the express 

 purpose of studying the effect of spraying upon the starch con- 

 tent of the potatoes. Owing to the fact that in most instances 

 the spraying was begun so late that none of the potatoes here 

 sampled completely escaped the attack of the blight, it was 

 thought that very little, if any, difference would be found 



