68 
PROCEEDINGS OF THE SCIENTIFIC ASSOCIATIONS 
would be constantly going on in tbe one, while the clear 
purified water in the 1 second would be employed for the 
supply of the town. The chemical processes required for 
the determination of the amount of lime in the water 
and the amount necessary to be added in order to render 
it insoluble are very simple and would occupy but a short 
time. The deposits of insoluble chalk or carbonate of 
calcium at the bottom of the reservoirs would require to s 
be removed about once in six months, and as the reservoirs in 
use for this process would be covered over no other clean- 
ing would be required. This process in fact to a great 
extent does away with any necessity for settling beds an^ 
filtering reservoirs, as these two processes are carried on 
together in the precipitating reservoir itself. Not only 
does the water after treatment by this process become 
softer, but it also loses to a great extent the organic im- 
purities that previously existed in it. As a proof that it 
is quite practicable for use in this island I may mention 
that it is used in some towns in England, where the water 
is hard, which are far larger than even Port of Spain, 
viz., Croydon, Canterbury &c. 
As for the other two sources by which it is proposed to 
supply San Fernando, both of them have great disadvan- 
tages, which are nt»t in my province to discuss, belonging 
properly to the Engineer. I may state, however, that both 
the Morocoy sample and that from the Hot Springs at 
Pointe-a- Pierre are in their natural condition superior to 
that from the Morichal Spring. The following table of 
analyses will shew for itself the differences which exist 
between these waters. 
