8 



MASS. EXPERIMENT STATION BULLETIN 390 



Wolf (55), in a study of the distribution of vitamin C in potatoes, concluded 

 that the outer tissues are 8 to 46 percent richer in total ascorbic acid than the 

 inner, but that in the skin 19 to 55 percent of the total is dehydroascorbic acid. 

 In the inner part only to 20 percent of the total ascorbic acid was in the dehydro 

 form. 



Table 5. — Effect of Geographical Origin of Potatoes on Their 

 Ascorbic Acid Content 



Ascorbic Acid — mg, per gm. 



Variety and Source 



Average 



for 8 

 Tubers 



Average 

 for 

 Variety 



Irish Cobbler 



Massachusetts . 157 



California 0.122 



Virginia* 0.059 



Kentucky 0.200 



Maine 0.072 



New York 0.107 



Rural Russet 



Massachusetts 0.161 



Idaho 0.062 



New York 0.108 



Katahdin 



Massachusetts 0.120 



New York..., 0.155 



Maine 0.101 



Green Mountain 



Massachusetts 0.132 



Maine 0.095 



New York 0.136 



California 0.107 



Chippewa 



New York 0.099 



Massachusetts 0.096 



Triumph 



Idaho 0.132 



Louisiana** 0.051 



White Rose 



California 0.121 



Virginia* 0.073 



*In storage 2 months before being shipped — not considered in average. 

 **In storage 5 months before being shipped. 



0.13J 



0.110 



0.125 



0.117 



0.09/ 



