In early 1831, Dr. Beaumont conducted another set of experiments on St. Martin's stomach, ranging from the simple observation of normal digestion to the effects that temperature, exercise and even emotions have on the digestive process.
En 1831 Beaumont relizou outra serie de experimentos no estómago de St. Martin que ían desde a observación da dixestión normal ós efectos que a temperatura, o exercicio ou mesmo as emocións tiñan no proceso dixestivo.