OJJ THE CIRCULATION OF UNDERGROUND WATERS. 129 



Mr, George Pycroft, Kenton, Exeter. 

 1. Well situated in my house, on a liill-side one mile from tidal river Exe. 

 2. 80 ft. 3. 70 ft. , diameter 4 ft. 4.13 ft. ; do not know, but by two days' pumping 

 I once reduced the level to 3 feet, and it then rapidly refilled. 5. IvTot known : 

 well never exhausted. 6. Yes ; it varies from 6 ft. in excessively dry seasons to 

 13 ft. 7. Yes. I cannot say, but certainly in 6 hours. The bottom of well about 10 ft. 

 above mean sea-level. 8. Not known, but not hard ; excellent for washing and 

 drinking ; well filled to a few feet of the top with carbonic acid ; water frequently 

 contams well-shrimps. 9. New red conglomerate ; no cover of gravel or drift. 

 10. No cover of drift. 12. No. 13. No. 14. No. 15. No. 



ill-. George Pycroft, Kenton, Exeter. 

 1. Powderham Castle, right bank of Exe. 2. 30 ft. 3. 50 ft., diameter 3 ft. 

 4. Not known ; never exhausted. 5, Not known. 6. Not known. 7. Is aSected 

 by local rains, but how rapidly or to what extent not ascertained ; is 20 ft. below the 

 mean sea-level. 



8. Saline matters.. 14-19 (less) 



Organic „ 0-62 



14-81 



Degree of hardness . . 7-80 



9. Light porous red sandstone. 10. No. 11. No. 12. No. 13. No. 14. No. 

 15. No. 



Mr. Robert Blackburn, Trews Weii", near Exeter. 

 1. Within 50 j'ards from the river Exe. 2. 20 ft. above sea-level at Exniouth. 

 3.320 ft._ depth of well, and 250 ft. 9 inches bore. 4. Not ascertained. 5. 500,000 

 gallons in 24 hours. 6. In winter average height of water 2 ft. above summer 

 level. _ 7. Not aflected by rain. 8. Analysis of spring-water at Trews Weir : one 

 imperial gallon contains : — 



grains. 



Organic matter (including -168 oxidizing organic matter) -32 



Carbonate of lime 11-61 



Sulphate of lime 5-01 



Carbonate of magnesia 5-25 



Nitrate of magnesia 6'92 



Chloride of magnesia •41 



Chloride of potassium -79 



Chloride of sodium 5'59 



Oxide of iron and alumina -15 



Soluble silica -75 



Total residuum (gained at 140° C, hardness before boiling 27^°) 36-80 



9. Red sandstone, rain-drift. 10. No. 12. None. 13. Not known. 14. No. 

 15. None that we know of. 



Dr. Lake, Teignmouth. 

 1. Four wells in garden of Myln Villa, Coomb, West Teignmouth, sunk in 

 1874 by Teignmouth Local Board as an extra supply for town. These wells are in 

 the bottom of a valley not far from a culvert which was built to can-y the water of 

 the brook running in the valley; they are therefore independent of the brook, and 

 are supplied by springs breaking forth out of the rock in their sides and in those 

 of the adit connecting them. 2. The surface of ground about 100 ft. above mean 

 tide. 3. 30 ft., diameter 5 ft. 5. No certain means vet of ascertaining this. 8. 

 Analysis by Professor Frankland in parts per 100,000 :— Total solid impurity 40-00; 

 organic carbon -056; organic nitrogen -008; ammonia -001; nitrogen as nitrates 

 and nitrites -530; total combined nitrogen -5.30; chlorine 3-20; hardness, temp. lP-4, 

 perm. 11°-1. 9. See plan. 10. No. 13. No. 14. No. 15. No. 



Dr. Sj-mes Saunders. 

 1. The well at the Devon County Lunatic Asylum, Exminstev. 2. 1-50 feet. 3. 114 



18 



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