138 LABOR A TOR Y G VIDE IN PH YS1 OL OG Y. 



(11) Compare your results with those obtained from 

 other rabbits. What are the essential features of 

 the modified stethogram ? Formulate conclusions. 



(12) What effect has a sudden increase of intra- 

 pulmonary pressure upon the rate of the heart's 



action. 



(13) What nerve is distributed to both lungs and 

 heart? Admitting that it is possible for the ob- 

 served effects to be produced through the agency 

 of the nerves just named, state how this action may 

 be accomplished. 



(14) Could the effects be produced in any other way 

 than in that which you have given ? 



(15) Is the demonstration unassailable; if not, what 

 experiments would lead to results conclusive for or 

 against the theory ? 



(16) Is the minimum intra-pulmonary pressure, 

 which typically modified the stethogram, greater or 

 less than the respiratory pressure of forced ex- 

 piration ? 



(17) What effect upon intra thoracic pressure would 

 the induction of high intra-pulmonary pressure 

 have? 



(18) What effect upon blood flow would high intra- 

 pulmonary pressure accompanied by repeated acts 

 of forced expiration have? What incident effect 

 upon the rate of heart beat? 



(19) Dispatch the rabbit with chloroform after first 

 arranging the apparatus for a pneumatogram. 

 While holding the mouthpiece over or in a chloro- 

 form bottle or sponge, take a characteristic pneu- 

 matogram of chloroform poisoning. 



c. The elasticity of the rabbifs lungs. 



(20) After the death of the rabbit open the thorax 



