Page:Popular Science Monthly Volume 90.djvu/320

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304

��Popular Science Monthly

��shop. Build it warm and provide for some sort of a heating apparatus. Have plenty of light and ventilation and make it a pleasant place in which to work. Provide enough room so that later on an emery wheel, lathe, drill-press and other ma- chinery for the farm may be installed as well as a lighting plant.

��Ironing- Board that Becomes a Bench and Step-Ladder

AN ironing-board which can be adjusted so that the operator may sit down to iron, and which may be convert- ed into a bench for the tubs, a step-ladder, a sewing-table, or an invalid 's table finds a use in every house- hold. The board is made of sound lumber

strong enough for all the purposes for which it is intended. When not in use it folds up so that it can be placed in any out-of-the-way corner of the kitchen, closet, or pantry.

���How to Make Imitation Marble with Paints

VERY good imitations of mar- ble can be made by the fol- lowing method: Procure a tank sufficiently large for holding the articles to be treated. The articles are first given a coat of flat ground color. For gray marble, apply a coat of flat white, which is made of white lead, turpentine and a little dryer. For brown marble, add a little raw sienna and burnt umber to the ground color. After coat- ing the articles, allow them to dry thoroughly; then sand them with No. o sandpaper.

Fill the tank two-thirds full of water. To secure the gray eff^ect, take some flat white and add a little drop-black, enough to make a light lead color. With an old brush, spatter it on the surface of the water. Add a little more black and spatter it on the water. The articles, previously painted and sanded, are carefully slid into the tank. The colors floating on the water readily adhere to the

���flat surfaces and the desired result is obtained.

For the brown marble effect, tint the color with burnt umber, burnt sienna and raw umber. For the black, mix some turpentine with drop-black for the floating colors, using a dark lead color for the ground work. After the articles are per- fectly dry, they may be sanded lightly and varnished and also polished with a little crude oil and pumice stone.

To treat marble tops, apply a coat of flat color for the ground. If in bad

condition, add a second coat. When the ground color is thoroughly dry and smooth, the desired colors may be stippled on. After dry- ing for five minutes, spatter on a solution prepared by adding a lump of potash, the size of a walnut, to a pint of kerosene. The potash cuts the colors and the oil blends them together, producing a mot- tled effect. With a little practice, all the different marbles may be imitated. The work may be smoothed up and finished in shellac or varnish. — John L. Jacklin.

��Combination iron- ing board, table and step-ladder

��Removing the Cones from Ball Bearings on Magnetos

THE cones or inner races of the ball bearings used for sup- porting armatures of ignition mag- netos or small generators that supply lighting current in auto- mobiles are not easily removed by ordinary means. The common procedure is to force these on the shaft against a shoulder. When it is desired to remove a cone for replacement, the usual method is to force this off the shaft by driv- ing in a cold chisel between the shoulder and the cone so that it acts as a wedge. Serious damage has been done by inexperienced repairers and mo- torists when attempts were made to remove the cone at the collector-ring end of the armature in this manner. The slightest carelessness or slip of the chisel usually results in breaking the ebonite or hard rub-

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