THE LIBRARY, Bl 



oft" of Water. 6. The distribution of water led off, and the 

 effecting of this in determined proportions. 7. The 

 distribution of water in fixed quantities. 



The second part is devoted to the consideration of meaus 

 of procuring water, in regard to canals of irrigation ; and 

 after determining preliminaries, there are discussed schemes 

 of operation and works of execution. In regard to reservoirs, 

 there are discussed certain general principles connected 

 with them, and the construction of them ; followed by an 

 account of reservoirs in Spain. Fountains or springs from 

 subterranean sources are next discussed, with special 

 reference to the discovery arid opening up of subterranean 

 supplies; the geological strata, and the general conditions 

 of the strata in which they exist; the directions in which 

 the water flows in subterranean channels ; the most favour- 

 able points for discovering these ; the depths at which 

 they exist ; the delivery which may be expected from 

 them ; rules proposed in olden times for discovering and 

 opening up such supplies; and different methods which 

 have been employed in modern times ; artesian wells ; 

 raising of water by mechanical appliances ; machines which 

 jirc in use. 



The third part is devoted to irrigation, and there are 

 discussed the irrigation of arable lands, and of meadows. 

 In connection with the latter are discussed certain pre- 

 liminary matters ; general ideas regulating the operation ; 

 and methods employed. 



The fourth part is occupied with the reclaiming or 

 improvement of wet lands. Here are brought under 

 discussion drainage; warping; drying up of lagoons; 

 reclaiming of land from the sea; the planting of sand 

 dunes in Andalusia ; and the reclaiming of salt soils. 



Such are the contents of the first book. The second 

 book is devoted to works of irrigation in Spain. In 

 succession are brought under consideration those on the 

 Northern or Cantabrian slope of the country ; those 

 on the Western slope ; those on the Southern Oceanic 

 slope; those on the Southern Mediterranean slope; 



