TO PURIFY WATER.
An exhibition of an apparatus for purifying water was recently given at Columbus, Ohio. The machine is partly owned by a Columbus man, and, as a result, it is probable that a large factory in which the machines are to be made, will be built in that city. It was recently patented, and its capabilities were demonstrated to scientific men before it was brought to Columbus. These men, the owners claim, praised the machine very highly. To purify the water, it is run through a cylinder in which there is a coil of aluminum charged with electricity. The water then passes into an ordinary stone filter. A gallon and a half of water was treated at night. Sediment of a frosty sort, weighing about two ounces was secured. It was placed in a cloth sack to dry. The water was partly ontof it in the morning. The sediment felt and looked like a dark colored lard. In a little bottle a half pint of city water was poured, after going through the process of purification. Sediment settled in the bottle to a depth of three-quarters of an inch. The sediment will be analysed, also the water before and after being treated. The gentlemen who own the patent are Mr. Edward Boynton, of Columbus, and H. C. Bailey, of New York. They have treated city water in a number of towns, but claim that Colum-