. The Emporium of arts & sciences. empties, less water comesinto contact with the stone, and therefore a smallerquantity, in such a state, can only pass through. Like-wise a filtering stone used in the common way soon be-comes useless, from the filth insinuating itself into theinternal parts of the stone, out of the reach of the brush. In the method I propose and practise, the filtering-stone is placed within the water to be purified, whichpresses upon the outside of the filter, and the stone doesnot require to be supported in a frame as it needs only tostand within the water cistern; it will
. The Emporium of arts & sciences. empties, less water comesinto contact with the stone, and therefore a smallerquantity, in such a state, can only pass through. Like-wise a filtering stone used in the common way soon be-comes useless, from the filth insinuating itself into theinternal parts of the stone, out of the reach of the brush. In the method I propose and practise, the filtering-stone is placed within the water to be purified, whichpresses upon the outside of the filter, and the stone doesnot require to be supported in a frame as it needs only tostand within the water cistern; it will thus filter, in anequal time, double the quantity of water procured in thecommon mode; it fills itself, and requires no cleaning. Ihave upon this plan used one for more than three yearswith great success. I am, &c. April 18, 1810. William Moult. * Nicholson, vol. xxix, p. 324. From Trans, of the Soc. of Arts, vol. xxviii,p. 212. The silver medal was voted to Mr. Moult. C f/////,) r ///<■////<! r <////</ //t/(/./.. fa/ten i&i me c//t<///\i ,/ ,/ //r,/{/f</ ( <z#*6.
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Keywords: ., bookcentury1800, booksubjectindustrialart, booksubjecttechnology
