Excerpt from Slime-FiltrationThe effort to secure a continuously-acting filter has resulted in two important types being developed, of which the Ridgway and the Oliver are the best known. Both of these filters utilize a comparatively thin slime-cake. Both Operate very success fully, and compared with the thick-cake machines have de cided advantages, brie¿y stated as simplicity of design, prob ably lower capitalization-charges for equal capacit...
CHF 13.50
