12 



INTRODUCTORY 



" thumps " the expiration appears to he a short, jerking move- 

 ment of the tlank. In the abdominal form of respiration the 

 movements of the walls of the chest are limited. This occurs in 

 pleurisy. In the thoracic form of respiration the abdominal 

 wall is held rigid and the movement of the chest walls make up 

 for the deficiency. This latter condition occurs in peritonitis. 



Fic 



-Auscultation of the lungs can be practised to an advantage over the outlined 

 portion of the chest wall, only. 



A cough is caused by irritation of the membrane lining the 

 air passages. The character of the cough may vary according to 

 the nature of the disease. We may speak of a moist cough when 

 the secretions in the air passages are more or less abundant. 

 A dry cough occurs when the lining membrane of the air passages 

 is drv and inflamed. This mav occur in the earlv statre of the 



