DENTAL CARIES IN THE COTTON EAT(14)

the composition of the cereal-milk diet used in the previous experiments. It consisted of 17% casein, 5% celln flour,53% floured dextrin, 18% sucrose, 2% salts IV, 5% corn oil,and adequate levels of B vitamins. The various cereals usedwere substituted for the floured dextrin of the basal diet.In order to maintain approximately equivalent levels of protein and carbohydrate, the casein level was decreased to 12%and the amount of cellu flour raised correspondingly to 10%in the experimental diets.Potatoes were used as representative of an alkaline-ashfood. These were cooked, peeled, dried, and then reduced to aflour in a ball mill. "NVheat flour, rice flour, and finely g'roundoatmeal were used as representative acid-ash foods. Theash character of some of these foods was altered by the addition