150 Dr. Du RirJ/e Preller — Mineral Springs of Baden. 



730 and 860 metres (2,400 and 2,830 ft.) above sea-level, and at its 

 north-west end, near and beyond Baden, constitutes the so-called 

 " Laegern " ridge, whose altitude exceeds that of the surrounding 

 Molasse hills by fully 800 feet. In its central portion, the ridge is 

 intersected at right angles by the rivers Limmat, Reuss, and Aare, 

 at a distance of about four miles from their confluence near Turgi. 



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Fig. 2.- 



-Longitudinal section. Schinznach-Birmensdorf-Baden. 

 &00000 » vertical 30000 • 



Horizontal 



It is at the point of intersection of those rivers that the mineral 

 springs of Baden (Limmat valley), of Birrnensdorf and Mullingen 

 (Reuss valley), and of Scliinznach and Wildegg (Aare valley) rise 

 to the surface, their position coinciding in the main with the anti- 

 clinal axis of the Jurassic fold, as is shown in the plan and 

 longitudinal section. 



Fig. 3. — Transverse section. Baden. Horizontal 



vertical 





A typical transverse section of the ridge is the one exposed at 

 Baden (Ennetbaden), on the right bank of the river. It is repre- 

 sented in Fig. 3, and is about 16 kilometre, or one mile, in length, 

 the outer strata on each side of the fold being composed of Upper or 



