340 Studies on the Palreozoic Soils of North Wales 



the accompanying map which has been constructed from data in 

 British Rainfall, 1887-1912. The connection between elevation and 

 rainfall is strikingly seen on comparison of the orographical and rain- 

 fall maps. 



North Wales. Rainfall. 



25 to .'JO inches 

 ;{0 to 3.5 inches 



Mean annual rainfall 



35 to 40 inches 



11 



40 to 



Over 100 inches 



45 to 50 inches 



45 inches J---S 50 to 100 inches 



The writer estimates that in the four northern counties of Wales, of 

 the total surface 



7 % has a mean annual rainfall of 25-30 inches 



30-35 



