De la Paz and GARcfA: Use of Apomorphine.] 



[Phil. Journ. Scl, XI, B, No. 1. 



Fig. 1. Pressure produced by the water-air pump when 

 the escape of air through the glottis is artificially pre- 

 vented. 1, occlusion was produced between the tracheal 

 cannula and Y-tube; 2, occlusion removed; w, waves due 

 to oscillations of mercury in seeking its normal level: 

 z, zero line. 



i^^vv-A/vyvvvvVW^ 



Tpr Second 



Fig. 2. Intrapulmonic pressure during apomorphine emesis with the trachea not occluded. 1-8 

 indicate deep inspirations at the beginning of vomiting; 9, beginning of contraction of ab- 

 dominal wall; V, appearance of vomitus in the mouth. 



PLATE II. 



