CONTENTS. 



Art. 1. On Springs, Artesian Wells, and Spouting Foun- 

 tains. By M. Abago, . . Page 205 

 Whence is the Water of these Wells derived ? . 207 

 On the manner in which the Surface Water can exist and circu- 

 late in the various formations of which the crust of the Globe 

 is composed, . . . .215 

 Among Stratified Rocks there are great Chasms and Caverns, ib. 

 Even in flat countries there are Caverns into which whole 



Rivers are engulfed, . . 223 



Sometimes in the heart of these Stratified Rocks, besides 

 Pools of Water which are stationary, there are Water- 

 Courses, true subterranean rivers, which flow rapidly in 

 the Erripty Spaces found amongst the impermeable rocks, 224 



What is the Power which causes the Subterranean Waters to 

 rise, and projects them at the surface of the Globe ? 227 



On the Effects produced by Tides on some of these Foun- 

 • tains, . . .233 



Concerning the Temperature of the Water of Artesian 

 Wells, . . . 234 



Concerning the Daily Issues from some of the principal 

 Fountains, . . . £37 



Of Artesian Wells whose waters have been employed as 

 Moving Powers, . . 238 



Of the Advantage to which Industry, in various circum- 

 stances, has turned the Waters of Fountains, J}j, 



Sometimes Pits are sunk for the purpose of transmitting 

 into the interior of the earth, water, retained at the sur- 

 face by strata of impermeable clay or stone, and thereby 

 rendering extensive districts mere morasses, unfit for cul- 

 tivation, . . . 240 



Concerning some Anomalies which have been observed in 

 the Sinking and in the Play of certain Fountains, 242 



Are these Wells likely to become exhausted, . 245 



Of Gas Springs, • " • ib 



