[ iSi ] 



purposes is a very important one, but its solution cannot be 

 said to have been accomplished as yet in this country. Dr. 

 Dyson, Sanitary Commissioner for Bengal drew special 

 attention to this subject in a note, dated the 3ist March 1896. 

 In concluding this note, Dr. Dyson remarks. "The Saidpore 

 investigation confirms my favourable impression of tube wells 

 as an easy means of obtaining pure and wholesome water. 

 I am not, however, prepared to recommend their universal 

 use, because they are not suitable for all soils, but wherever 

 they can be got to work, I think they ought to be used in 

 preference to ordinary wells and tanks, than which they are 

 much cheaper and far more satisfactory. They are specially 

 suited for a loose sandy soil like that of Saidpore. In hard 

 laterite soil, or in clay, they cannot, of course, be got to 

 work, and in alluvial, soil, like that of Chittagong, Noakhali, 

 Backergunge &c., it is not desirable that they should be tried, 

 as in these places, which are subject to the influence of sea- 

 waves and salt tides, the water is brackish. It might be 

 mentioned that in soil which is suitable, the sandy beds of 

 nalas and the dry beds of good tanks, offer the best prospects 

 of rapidly sinking a water supply which is practically in- 

 exhaustible." 



232. Of the firms which manufacture and supply Arte- 

 sian and Tube-Wells and the driving apparatus and boring 

 tools, may be mentioned Messrs. C. Isler & Co., Artesian 

 Works, Bear Lane, Southwark, London, S. E., Messrs. W. 

 Leslie & Co. of Calcutta supply Tube- Wells at the following 

 prices: t. ' '] 



Drive point and 20 ft. i^ inch wrought iron tube in short 

 lengths with a pitcher pump ... ... ... Rs. 45 



25 ft. ... ... 50 



3 n 55 



40 ... ... ... 60 



