DENTAL CARIES IN THE COTTON EAT(6)

he controland experimental groups because of the observations madeby Schweigert et al. ('45) that cotton rats from differentparental stock varied in their susceptibility to cariogenicdiets. All animals were fed and watered ad libitum and weregiven two drops of haliver oil each week.In the first study the cariogenicity of the oatmeal diet wascompared with that of a partially synthetic, high sucrose diet.The partially synthetic diet contained 67% sucrose, 24Êsein, 4% salts IV (Phillips and Hart, '35, patterned afterthe salts of milk), 5% corn oil, adequate levels of B vitamins(Shaw et al., '44) and 4% 1: 20 liver extract. The cereal dietconsisted of 50% oatmeal, 32% dried whole milk and 18%sucrose. The total sugar content of this diet was 30% (18%sucrose and 12% lactose). The animals w