Proceedings Roj Soc. sEeLitP Yol VII. 
B 
Ca^eS of tern sources and two sinks giving threes egwnls streams circles with/ two 
points oh 7/ij'o flow. When/ oo source/ ansi svnJc/ ares' transposed/ they lower circlet 
is stills a/ hnes of llow. The/ other lines assume/ thee dotted' tunny. 
