1SCC] Mr. Wahlie on the water of the Hooyhly, <fc. 203 



fig. 4, 4a. They occur in a thin-bedded, dark-grey, argillaceous 

 limestone, having in some places the appearance of a calcareous 

 slate. But beds of Weean limestone must exist not far from Sono 

 Murg and form propably some of the beds of limestone which are 

 seen in the high valley between the Ambernath and the Gwashbrari, 

 as blocks of limestone of this description, rounded by running water, 

 were found in the bed of the Sind, near the traveller's home at 

 Sono Murg. 



To he continued. 



Experimental investigations connected with the snp}>ly of water 

 from the Ilooyhly to Calcutta, hy David Waldie, tisy. F. C. S. &c 



[Received 31st August, 18G6.] 



The attention which of late years has been given amongst civilized 

 communities to the preservation of health and prevention of disease, 

 has naturally been directed amongst other subjects to that of the 

 water employed for economical purposes, and more particularly to its 

 purity and wholesomeness as a beverage and as the medium for the 

 preparation of food. The subject has been under the consideration 

 of the municipal authorities of Calcutta, who, as is well known, have 

 organised a scheme for the supply of the town from the river Hooghly, 

 for the carrying out of which arrangements are now in progress. 

 The Sanitary Commission appointed some time ago in the Bengal 

 Presidency, and I believe in the other Presidencies also, recommended 

 to the several governments of the Subdivisions, that the water of the 

 various cantonments and stations should be subjected to chemical 

 analysis for the purpose of ascertaining their wholesomeness, and 

 these recommendations are in course of being carried out. 



In England, and more particularly in the metropolis, much attention 

 has been given to the same subject, and also to another one closely 

 connected with it, namely, the disposal of the sewerage of towns. This 

 subject is connected with that of water supply, not only, because in 

 the plan generally followed for getting rid of sewerage in towns, a large 



