Dr. F. Semon. On the Position of the 



The weight of evidence, therefore, is entirely on the side of the 

 glottis being wider open, during quiet respiration in. life than after 

 death. 



b. Direct Measurements of the Width of the Glottis during Quiet 

 Respiration in Man. 



Surprisingly few direct measurements of the width of the glottis 

 during quiet respiration have apparently been made. 



In the childhood of laryngoscopy, graduated mirrors were recom- 

 mended for making accurate observations concerning this and other 

 points of physiological interest, and some short notice on such mirrors 

 will be found in almost every text-book of laryngology.* On the 

 whole, however, it appears that very little practical use has been 

 made of these mirrors. Altogether, I find only the following metricf 

 statements on the width of the glottis as seen during life and after 

 death : 



The numbers given in this table, however, for the following 

 reasons, can only be used with great discretion. To begin with, 

 Solis Cohen's and Mackenzie's statements have been added for the 



* See, for instance, Merkel, loc. cit., p. 5; Mandl, loc. cit., p. 116; Semeleder, 

 loc. cit., p. 24 ; Tiirck, loc. cit., p. 142 ; Mackenzie, loc. cit., p. 224, &c. 



t For convenience, I have reduced all of them to millimetres. 



J Loc. cit. 



Loc. cit., and, p. 87, ibid. 



|| Loc. cit. 



TF Loc. cit., p. 172 and 173. 

 ** See Merkel, loc. cit., p. 172. 

 ft Loc. cit. 



