NSRW Artificial Ice - filters

Distilled water is run through several kinds of filters. In this illustration the two large cylinders you see in the rear are charcoal filters. After the water has passed through these cylinders it is pumped through pipes into the kind of filters at which you see these men at work. The men are putting on a fresh filter cloth. Over this cloth is fastened another and coarser filter of perforated metal. Under the cloth is another disk of perforated metal. The water enters by the small pipe in the rear, is forced through the perforated metal and cloth and comes out into the larger pipe you see in front.