BV ROBERT L. JACK, F.G.S., F.R.G.S. 



71 



to prove that, as the strata are periodically filled up with water, 

 they must first have lost a certain amount by leakage. In the case 

 of Australia the only possible escape is beneath the ocean, and 

 although we cannot observe this leakage with the bodily eye, we 

 may believe in it, as we believe in many things we cannot see. 

 A powerful confirmation of this view is supplied by the fact that 

 some important artesian basins elsewhere leak out on land, while 

 the rest have the physical conditions which must inevitably lead 

 to submarine leakage. 



