Henry T. Finck,
Food and Flavor: A Gastronomic Guide to Health and Good Living
“ Sweet potatoes also are of American origin. They have been slow in making headway in Europe because they do not, like the white potato, grow in almost any soil and climate. Farmers' Bulletin No. 324 is devoted to sweet potatoes. Its author, W. R. Beattie, of the Bureau of Plant Industry, remarks that "as a commercial truck crop the sweet potato would be included among the five of greatest importance, ranking perhaps about third in the list. As a food for the great mass of the people living in the warmer portions of our country the use of this crop is exceeded by hominy and rice only." ”
