The polishing and plating of metals; a manual for the electroplater, giving modern methods of polishing, plating, buffing, oxydizing and lacquering metals, for the progressive workman . to an even composition, and to this fourcubic feet of stone are added, and the mass thoroughlyshoveled over. Water is now added, so that, while no mud-diness is apparent, each particle is moist. The mass isagain shoveled over and is now ready for the mold. This mold may be of any shape whatever. It is set on,asolid floor, with a sheet of building paper underneath so thatthe tank does not bind to the floor. The
The polishing and plating of metals; a manual for the electroplater, giving modern methods of polishing, plating, buffing, oxydizing and lacquering metals, for the progressive workman . to an even composition, and to this fourcubic feet of stone are added, and the mass thoroughlyshoveled over. Water is now added, so that, while no mud-diness is apparent, each particle is moist. The mass isagain shoveled over and is now ready for the mold. This mold may be of any shape whatever. It is set on,asolid floor, with a sheet of building paper underneath so thatthe tank does not bind to the floor. The sketch shows a formfor a commercial-plating bath. The outer frame is trued at THE POLISHING AND PLATING OK METALS. II7 right angles and braced by struts to the floor to prevent bulg-ing of the sides under the rammer. The concrete is nowshoveled in, a few inches at a time, and thoroughly rammeduntil the water shows at the surface. For a tank of the sizeshown three men are needed ramming and two men mixingand handling concrete. The tools needed are iron rammers,about 2 inches thick and 3 or 4 inches square, with a sleevefor a wooden handle. Such a tool, handled with a short, stiff. Fig. 33. Tank Form for Cement Tanks. blow, is better than a lighter tool, with a springy blow, theidea being simply to drive out the air from between theparticles and completely fill the voids. As soon as the bottom is of the desired thickness the innerframe is put in place and braced by cross pieces to preventinward bulging. The sides are now rammed up. a fewinches at a time. It is not desirable to lay the sides in lay-ers, but rather to carry them up without coursing or strati-fication. One thing is very important, that there be nostoppages. If a meal time intervenes the men should berelieved one at a time, so that no pause occurs till the tank-is completed. The top finish is put on bj bringing the concrete to withina quarter of an inch from the top of the mold and carryingthis up with equal parts sa
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectelectro, bookyear1904
