34 BULLETIN 1041, IT. S. DEPARTMENT OF AGRICULTURE. 
(17) MlYAKE, 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) Shivee, F. S. 
1901. Sweet potato. S. C. Agr. Exp. 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 pi. 
(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. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCTTKED FROM 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRINTING OFFICE 
WASHINGTON, D. C. 
AT 
10 CENTS PER COPY 
