1895 The Lancet  
1132 to the quantities of food taken. Not only does it take a longer time for larger quantities to be impelled on, but the motor activity of the stomach walls is diminished by the greater distension produced by the larger amount of food present. Thus, pieces of meat are frequently found a day or longer after ingestion. 3. The shorter or longer stay of food depends on the amount of acidity, which varies in different stomachs even within the border lines of health. 4. Much variation even in
more » ... ation even in health is caused by individuality, by presence or absence of pepsin, hydrochloric acid, psychical factors, and emotions (fright, fear, grief, or the opposite, as joy or
doi:10.1016/s0140-6736(02)03870-9 fatcat:glbagtshgjcihdbwxy3tdfkqmy