Popular Science Monthly 



601 



from the center, and the lliird 9-32 in. 

 in diameter 7-16 in. from tlic center. 

 Maice these three holes in Hne. 



Procure a snap fastener, such as is 

 comnionK' used on women's ciothinjj, 

 and iiistrt the ball end in the center hole 

 of the celluloid disk. Place the sprinjf 

 clip on this and snap the top ]3art of the 

 fastener in place. If desired, a ri\et 

 and small metal washer may be used in 

 place of the fastener, as this allows the 

 cap to be taken apart. Be sure to ha\e 

 the ears of the clip high enough to allow 

 the disk to rest on the ledge in the neck 



The cap in position in the bottle neck 

 and the materials necessary to make it 



of the bottle and use a tight fastener. 

 To use the cap, place it in position on 

 the milk bottle and revoh-e the spring 

 clip around the neck of the bottle, 

 iinco\ering the holes in the disk. The 

 milk pours freeh' from the large hole, 

 while the other hole admits air. 



How to Lighten the Finish 

 on Woodwork 



IN treating woodwork to match an- 

 other finish, it is freciuently difficult 

 to secure the right effect. If the wotxl- 

 work is too dark, oxalic acid, diluted in 

 water and applied with a cloth, will pro- 

 duce thedesired result. It should he sand- 

 papered before it has comj)letely dried, 

 with No. I, and after com|iletely flrying, 

 with \'o. ].■,■ This method holds e(|uali\- 

 good in acid and water-stain. If \arnish 

 has been applied, it nmst be removed by 

 a varnish remover (adelite), otherwise 

 the oxalic acid will have no effect. 



Repairing Worn Wheels of a 

 Carpet- Sweeper 



THE revolving brush of the ordinary 

 carpet-sweeper is driven by the 

 friction of the wheels on which the 

 s w e e p e r runs 

 against driving 

 wheels on either 

 end of the brush 

 axle. To insure 

 good friction the 

 peripheries of all 

 of these wheels 

 are coveretl with 

 tightly fitting 

 rubber rings. In 

 time these rings 

 wear out, or the 

 rubber becomes 

 hardened and 

 loses it grip. 



-An efficient method of repairing 

 a sweeper having imjicrfect or worn 

 rubber rings is to co\er the wheels with 

 common electricians' tape such as is em- 

 [)loyed for covering joints in wire. The 

 tape should first be wound around the 

 periphery of the wheel until a covering 

 nearly equal to the thickness of the orig- 

 inal ring is attained. This should then be 

 secured in place by passing the tape 

 around the ring and between the spokes 

 of the wheels. The gripping power of 

 the tape is fully equal to that of the 

 original rubber rings, and the sweeper 

 will be good for ser\ice until other parts 

 wear out. — George H. Hall. 



Adhesive tape on a 

 sweeper - wheel 



A Bottle- Stopper Made of Glass 

 and Rubber 



A NEW stopper 

 for bottles is 

 com()t).sed of glass 

 and rubber. The 

 glass part is in 

 reality a small 

 stopper, threaded 

 to screw into the 

 rubber. It has a 

 narrow flange 

 ab:)\e the rubber, 

 and ends in a flat 

 ke\-like knob for 

 turning. When 

 fitted into the 

 bottle, a turn or 

 two tightens it. 



The glass part is 

 threaded to screw 

 into the rubber 



