304 



thus obtained a supply from the Bore Holes at the shafts only. 

 This having been done, the water served was, and continues to 

 be, the purest spring water of the character first analyzed by 

 De. Voelcker.* 



The overflow of the springs into the river shewn on the 

 section is an interesting feature of this case, (and has indeed 

 caused me to occupy your attention vpith this paper), as affording 

 an instance of what may be said to be characteristic in the 

 hydrology of the Cotteswolds. The waters in the Catchment 

 basin of the Avon above Malmesbury, where they traverse the 



* The following letter from Mr. J. C. S. Jennings, the Chairman of the 

 Malmesbury Water Works Company, has lately been published : — 

 MALMESBURY WATEE WORKS. 

 To the Editor of the Wilts and Oloucester Standard. 

 Sir, — It may be interesting to the public to know that the Malmesbury 

 Water Works Company, Limited, having found it necessary within the last 

 few years to extend their works by sinking another shaft into the deep 

 Oolite, to obtain a further supply of spring water, have recently had the 

 water obtained from the shaft in the engine house, from which it is pumped 

 direct to the tank (thus supplying the tops of aU the houses in the town if 

 required) analyzed, and that the following is the result of the analysis : — 



per gallon. 



Total SoUds 21-5 grains 



Ammonia 



Albuminoid Ammonia 



Chlorine 



Nitrates 



Nitrites 



Hardness 



Permanent Hardness 

 A first-rate water in every respect. 

 (Signed) Chables Heisch, F.C.S., late Professor of Chemistry 



00 

 0-0075 

 1-47 

 000 

 0-00 



19 Clarke 

 7-75 



in the Medical College of 



Middlesex Hospital; Superintending Gas Examiner to the Corporation of the City of 



London. 



July 10, 1876. 



This analysis corresponds very closely with that made by Professor 



VoELCKEK, in July, 1863, to which report he then added:— "It is a 



remarkably wholesome water, and not excessively hard, and there is an 



advantage in waters that are somewhat hard, that they do not attack lead 



so readily as very soft waters. I have no doubt it will be found an 



excellent drinking water." 



I am, Sir, yours faithfully, 



J. C. S. JENNINGS. 



