66 



AUSTRIA-HUNGARY. 



engineering work of importance dates back to the third century, and for it we are 

 indebted to the Romans. It is known as the Canal of Probus, and partially 

 drains the swamps to the south of the Fruska Gora.* 



But whilst one portion of the country has a superabundance of water, another 

 portion suffers from the want of it. The hills sloping down towards the Save are 

 as cavernous as are those facing the Adriatic. Nowhere are underground river 



Fig. 41. — The Caverns of Postoina (Adelsberg). 

 Scale 1 : 120,000. 



11° 50 E Of Pans 



JcLCO^O Vt/X 



'tZÉ"^'*m 



SCALE l.iaOfOOO 



SuhUrrovenn course 



of the 

 ■ Pinko and Caverns 



channels more numerous than in the range of the Kapella, between Zengg and 

 Ogulin. Many villages are dependent upon cisterns for their water, although 

 voluminous rivers flow through inaccessible caverns beneath them. After heavy 

 rains, and when the snows melt, these rivers appear on the surface, and sometimes 



* Total length of the Save, 660 miles ; area of its catchment basin, 33,990 sq. miles; difference 

 between high and low water, 31 feet; discharge per second below the Drina— in summer, 24,900 cubic 

 feet; when in flood, 144,000 ; average, 39,500 cubic feet (Zomberg, " Regulirung des Saveflusses"). 



