It is doubtful if an adulterated sugar can be found in the United States, notwithstanding the tales of the grocer who "sands" his sugar, and of the producer who adds terra alba or some other adulterant.
"Cuba, Old and New"
Albert Gardner Robinson
A product, used as a substitute for or an adulterant of coffee, containing a bitter principle, and made from the root of the endive and other similar plants.
"The Wonder Island Boys: Exploring the Island"
Roger Thompson Finlay
On the basis of these results Funk put forward the idea that McCollum's butter-fat and egg-yolk factor was merely vitamine which clung to the fats as an adulterant.
"The Vitamine Manual"
Walter H. Eddy