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Show eoNSTOUCTtoN PLANK FORMS - ' TO PPEVEfHT BULGING I Mixing of concrete should be dono on a flat water-tight platform. Spread tho sand In n layer of even depth, placo tho cement on top aud turn with tho shovel nt least three times, or until un-til tho two nro thoroughly mixed as shown by uniform color. Stone (thoroughly wet) should then bo thrown on top of tho whole and turned nt lonst three times, water being added on the second turning, tho quan. tlty varying according to the nnturo of tho work. In general sufficient water should bo used to glvo a "mushy" mix-turo mix-turo Just too sort to bear the weight of n man whon in plnco. Water should bo added to the mixture of atone, sand nnd cement, a llttlo at a time, until the proper consistency is reached. A sprinkling pot Is handy for adding water wa-ter ns it does not wash away the cement. In making tho forms, green tlmbor s preferable, for If seasoned It Is likely to swell and warp whorj brought In contact with molsttiro from tho concrete. con-crete. Pine or spruco aro suitable. If n smooth surfaco is desired the sheathing sheath-ing next tho concreto roust be planed. It Is usually advisable to greaso tho Inside In-side of tho forms with soap, linseed oil or crude oil; otherwise particles ol concrotn will bo detached when thi forms nro removed thus giving a rougt surfaco to the wall. Forms should not ho greased whon It Is Intended to plas tor the surface of the concrete, but should bo thoroughly wet Immedlatolj beforo placing tho concrete, Formi should be left In placo from three to four weeks If thero Is any earth oi water pressure against the wall. It on the other hand, there Is no strain upon It, 21 hours' setting, or until the concrete will withstand tho pressure of tho thumb without Indentation, Ii 'sufficient. An easy method of preventing the forms from bulging Is shown In the Illustration abovo. Two holes are bored In both sides of tho form nnd a wlro passed through them and the ends tied together. A piece of wood or largo rail Is then used to twist the two strands together. The form can thus be drawn -together nnd held securely se-curely In plnco. In removing tho forms cut tho wire at tho sldos and trim off even with tho wall. i |