EXPLANATION OF PLATE IL 



Fig. 3. 



Transverse section passing through the plastic portion of a clot in 

 the femoral artery of a dog. Preparation 48 hours old. High power. 

 See pp. 28-29. (First Series.) 



Fig. 4. 



Apex of the thrombus represented in Fig. 2, magnified 200 diam- 

 eters. See p. 35. (First Series.) 



( ^;o ) 



