34 BULLETIN 1041, U. S. DEPARTMENT OF AGRICULTURE. 



(17) MiYAKE, KlICHI. 



1915. On the nature of the sugars found in the tubers of sweet potatoes. 

 In Jour. Biol. Chem., v. 21, no. 2, p. 503-506. 



(18) Shiver, F. S. 



1901. Sweet potato. S. C. Agr. Esp. Sta. Bui. 63, 37 p. 



(19) Thompson, H. C, and Beattie, James H. 



1922. Group classification and varietal descriptions of American varie- 

 ties of sweet potatoes. U. S. Dept. Agr. Bui. 1021, 30 p., 8 pL 

 (partly col.) Literature cited, p. 26-30. 



(20) Weinzirl, John. 



1919. The bacteriology of canned foods. In Jour. Med. Research, v. 39^ 

 no. 3 (172), p. 349-413. Bibliography, p. 411-413. 



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