[327] cf. Asclepiades’s theory regarding the urine, p. [51].

[328] The process of application or prosthesis. cf. p. 223, [note 3].

[329] Mutual influence of organism and environment.

[330] Qualitative change. cf. Book I., chap. [ii].

[331] Apparently skin-diseases in which a superficial crust (resembling the lichen on a tree-trunk) forms—e.g. psoriasis.

[332] Note especially pneuma and innate heat, which practically stand for oxygen and the heat generated in oxidation. cf. p. 41, [note 3].

[333] Book I., chap. [x].

[334] That is to say, faeces are obviously altered food. This alteration cannot have taken place entirely in the small intestine: therefore alteration of food must take place in the stomach.

[335] cf. p. [39].

[336] Asclepiades held that there was no such thing as real qualitative change; the food was merely broken up into its constituent molecules, and absorbed unaltered. cf. p. 49, [note 5].