33. That the use of _ardent spirits always_ produces disease of the stomach if persevered in. 34. That _water_, _ardent spirits_, and most other _fluids_, are not affected by the gastric juice, but pass from the stomach soon after they have been received. 35. That the _quantity_ of food generally taken is more than the wants of the system require; and that such excess, if persevered in, generally produces not only functional aberration, but disease of the coats of the stomach. 36. That _bulk_ as well as _nutriment_ is necessary to the articles of diet. 37. That _bile_ is not ordinarily found _in the stomach_, and is _not_ commonly _necessary_ for the digestion of the food; but, 38. That when _oily_ food has been used it assists its digestion. 39. That _oily_ food is difficult of digestion, though it contains a large proportion of the nutrient principles. 40. That the _digestibility_ of aliment does not depend upon the _quantity_ of nutrient principles that it contains. 41. That the natural temperature of the stomach is about 100° Fahrenheit. 42. That the temperature is _not elevated_ by the ingestion of food. 43. That _exercise elevates_ the temperature; and that _sleep_ or _rest_, in a recumbent position, _depresses_ it. 44. That _gentle exercise_ facilitates the digestion of food. 45. That the time required for that purpose is various, depending upon the quantity and quality of the food, state of the stomach, &c.; but that the time ordinarily required for the disposal of a moderate meal of the fibrous parts of meat, with bread, &c.; is from three to three and a half hours. A few more inferences are given, but are here omitted because they refer exclusively to the _chyle_, which has not yet been treated of. The first is probably erroneous, and the second and seventeenth are, perhaps, too strongly expressed. A complete change of diet, for example, causes _some_ variation in the gastric juice, although the latter inference, taken in a literal sense, affirms the contrary. CHAPTER IV. CHYLIFICATION, AND THE ORGANS CONCERNED IN IT.