190 ERRORS ATTRIBUTED TO ARISTOTLE. [LECT. 



larger divisions as obviously contain cartilages ; and 

 that by Sia^vaew xov$pd>8ei,<} he denotes the same 

 things ; and, if this be so, then the rp^ara must be 

 the smaller bronchial canals, in which the cartilages 

 disappear. 



This view of the structure of the lung is perfectly 

 correct so far as it extends ; and, bearing it in mind, 

 we shall be in a position to understand what Aristotle 

 thought about the passage of air from the lungs into 

 the heart. In every part of the lung, he says, in 

 effect, there is an air tube which is derived from the 

 trachea, and other tubes which are derived from the 

 Tropoi which connect the lung with the heart (suprd, C). 

 Their applied walls constitute the thin "synapses" 

 (rr)v vvvatyiv) through which the air passes out of the 

 air tubes into the ir6poi t or blood-vessels, by transuda- 

 tion or diffusion ; for there is no community between 

 the cavities of the air tubes and cavities of the canals ; 

 that is to say, no opening from one into the other 

 (suprd, D). 



On the words " reowbs TTO/JO? " Aubert and Wimmer 

 remark (1. c. p. 239), "Da A. die Ansicht hat die 

 Lungenluft wtirde dem Herzen zugefuhrt, so postulirt 

 er statt vieler kleiner Verbindungen einen grossen 

 Verbindungsgang zwischen Lunge und Herz." 



But does Aristotle make this assumption ? The 

 only evidence so far as I know in favour of the affir- 

 mative answer to this question is the following 

 passage : 



Se KOU rj KapSia rfj dpTrjpia, 7ri//,eAwSe<T6 Kal X ov ~ 

 S/ocoSecrt KCU tvw8(7t Seoyxois* y Se (rvvrjpTeTai, KOtXov ICTTIV. 



