48 WAEM SPRINGS, 



In a factory at Heilbronn five spring-wells, 

 some of which are not one hundred feet deep, and 

 from which the water rises eight feet above the 

 level of the Neckar, yield enough pure water to 

 supply all the wants of two paper-works, of a 

 bleaching, and of a flax-spinning establishment. 

 Moreover, as these springs have a constant tempe- 

 rature of 12°'5 0. (55 0, 4 Fahr.), the proprietors are 

 enabled by letting the water run from the ves- 

 sels into the mill-trunk to keep the wheel free 

 from ice during the severest cold of winter. This 

 last application has since been imitated at several 

 other places. 



Several artesian wells have obtained a great 

 reputation as medicinal springs ; as, for instance, 

 the mineral waters of Cannstadt, which contain 

 salt and carbonic acid, supplied by a well that was 

 bored in 1777. The salt-spring at the baths of 

 Nauheim in the Wetterau comes up out of the 

 bore-hole with a temperature of 30° C. (86° I\) 

 This warm brine-spring broke out not long ago 

 through an old deep boring, that had been aban- 

 doned for some years, and has been throwing up 

 ever since without intermission a jet of foaming 

 water from the welTs mouth. A still more striking 

 instance of the force with which underground 

 waters flow, was given in the year 1763 at Diir- 

 renberg. A mine-shaft had been sunk to a depth 

 of seven hundred and ninety-one feet, when sud- 



