Potential Problems connected with the Circular Arc. 275 



exemplifies the case of the stream dividing at the edge of the 

 lamina, noted at the end of the preceding- paper. (It may 



Fig. 3. 



-J'O — 



= - 45 c 



Fig. 4. 



3 = 6 



be noted that equations (3) and (4) are in agreement "with 

 the results given in a recent paper by Dr. J. &. Leathern.) 



