I.IOO 1,200 1^)00 1,400 



Volume in cubic centimetres . 



Fig. 7. 



I.BOO 



250 



Experiments with Hollow Viscera 

 In these experiments attention was confined chiefly to the bladder, as its 

 shape approaches more closely to the spherical than other viscera. Experi- 

 ments on lungs proved impossible, owing to the remarkably low bursting 

 pressure of the superficial air cells. A number of observations were made 

 with bladders taken from the recently killed animal, but the erratic behaviour 

 of the living muscular tissue did not allow of a definite pressure being- 

 assigned to any stage of inflation. Consistent results could only be obtained 

 by experimenting with bladders some time (24 hours) after the death of 

 the animal. 



