ON THE CIRCULATION OF UNDERGROUND WATERS. 



291 



Collected by C. E. de Range from Dr. Lloyd Roberts, Medical OflScer 



of Health, Denbigh. 



Pont Ystrad Pumping Station. 

 Well 20 feet 9 inches deep. — Denbigh Water Company. 



Fig. 1.— Pont Ystrad Pumping Station. Section of Well and Bore-hole. 



Surface of Ground. 



n ft. '^i£ii!MML 



■,•;/■ » '■/■.•..-.:• . 



V^Sr^'-^^ 9 ft. Gravel. 



3 ft. Clay. 



2C ft. in. 



soft. 



14 ft. 6 in. Gravel. 



3 ft. 6 in. Red Sandstone. 



• GG ft. 9 iu. Variegated Marl. 



svt 



\ ertical Scale, — .i\-„f 



25 ft. to 1 in. 'y=S^ 



Horizontal Scale, 'i-4^ t-r. 



4 ft. to 1 in. r-.V!'^-^ 



139 ft. C in. 



4 ft. 1 iu. Variegated JIarl 





Depth on October 7, 187;t. 



Analyns made hy Dr. Campbell Bkowne, April 14, 1882. 



Total solids in solution 



Organic carbon 1 ,x. in 



Orlanic nitrogen j(^'^^°^^°"^y) 



Ammonia 



Ammonia from organic matter, by distillation with") 

 alkaline permanganate ..... j 



Nitrogen, as nitrates and nitrites 



Combined chlorine 



Hardness, temporary ........ 



„ permanent 



Total , 



This is an excellent water for domestic use. 



Parts per 100,000. 

 20-1 



•003 



•009 



•069 

 2 059 



7-5° 

 60° 



13 5" 



U2 



