T HE transit rate of feedstuffs through the intestinal tract of the fowl has been studied at periodic intervals during the past 50 years. These studies usually reported the time required for feed to pass from the crop to the vent or for a given amount of feed to leave the crop. Brown (1904) measured the time required for crop emptying when different amounts of whole corn and oats were fed. He found that increasing the crop load with either grain resulted in a prolonged emptying time. Card et al. (1926), using mature hens starved for 24 hours, observed that more time was required for crop emptying when ground corn or tankage was fed than whole corn. Kaupp and Ivey (1923), using lampblack, measured the transit time of this dye through the alimentary tract of the fowl and found that growing birds and laying hens had a much faster transit time than did broody hens. Heuser (1945) observed that transit from the crop was influenced by the crop load, which is in agreement with the findings of Brown (1904). He also noted that mash passed at a faster rate than grains, and wet mash faster than a dry mash. The latter would indicate that