To men oun hapanta ta trephomena moria poiein ti perittôma synchôroumenon, to de tous nephrous monous, houtô smikra sômata, choas holous tettaras ê kai pleious ischein eniote perittômatos outh' homologoumenon oute logon echon; to gar hekastou tôn meizonôn splanchnôn perittôma pleion anankaion hyparchein. hoion autika to tou pneumonos, eiper analogon tô megethei tou splanchnou gignoito, pollapla||sion estai dêpou tou kata tous 72 nephrous, hôsth' holos men ho thôrax emplêsthêsetai, pnigêsetai d' autika to zôon. all' ei ison phêsei tis gignesthai to kath' hekaston tôn allôn moriôn perittôma, dia poiôn kysteôn ekkrinetai? ei gar hoi nephroi tois kôthônizomenois treis ê tettaras eniote choas poiousi perittômatos, hekastou tôn allôn splanchnôn pollô pleious esontai kai pithou tinos houtô megistou deêsei tou dexomenou ta pantôn perittômata. kaitoi pollakis, hoson epie tis, oligou dein ourêsen hapan, hôs an epi tous nephrous pheromenou tou pomatos hapantos. Eoiken oun ho to triton exapatôn houtos ouden anyein all' euthys gegonenai kataphôros kai menein eti to ex archês aporon Erasistratô te kai tois allois hapasi plên Hippokratous. diatribô d' hekôn en tô topô saphôs eidôs, hoti mêden eipein echei mêdeis allos peri tês tôn nephrôn energeias, all' anankaion ê tôn mageirôn amathesterous phainesthai mêd' hoti diêtheitai di' autôn to ouron homologountas ê || touto synchôrêsantas mêden 73 et' echein eipein heteron aition tês diakriseôs plên tês holkês. All' ei mê tôn ourôn hê phora tê pros to kenoumenon akolouthia gignetai, dêlon, hôs oud' hê tou haimatos oud' hê tês cholês ê eiper ekeinôn kai toutou; panta gar hôsautôs anankaion epiteleisthai kai kat' auton ton Erasistraton. Eirêsetai d' epi pleon hyper autôn en tô meta tauta grammati. [5] That is, "On the Natural Powers," the powers of the _Physis_ or Nature. By that Galen practically means what we would call the physiological or biological powers, the characteristic faculties of the living organism; his Physis is the subconscious vital principle of the animal or plant. Like Aristotle, however, he also ascribes quasi-vital properties to inanimate things, _cf._ Introduction, p. xxvii. [6] _Ergon_, here rendered an _effect_, is literally a _work_ or _deed_; strictly speaking, it is something _done_, _completed_, as distinguished from _energeia_, which is the actual _doing_, the _activity_ which produces this _ergon_, _cf._ p. 13, and Introduction, p. xxx. [7] Gk. _psyche_, Lat. _anima_. [8] Gk. _physis_, Lat. _natura_. [9] _Motion_ (kinesis) is Aristotle's general term for what we would rather call _change_. It includes various kinds of change, as well as movement proper, _cf._ Introduction, p. xxix.