Anatomical Changes. 



1065 



cavity either remains of normal thickness, or appears to he 

 even thicker (Dilatatio activa). In this case the presence of 



Fig. 18G. Cardiac Dilatation. The dotted line gives the normal heart dullness, 



the solid line indicates the enlarged heart dullness (4th to 0th intercostal space), 



the dullness passes backward into the aiiterior border of the liver dullness, which is 



also enlarged. (Same dog as in Fig. 187.) 



Fig, 187. C'uiflinc Dilatation. Enormously increased cardiac dullness on the right 



side. The dotted line gives the borders of the dullness, which occurs normally in 



large dogs. (The same dog as in Fig. 186.) 



