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top of a bolt fastened in a vise as shown in Fig. 6. Insert a short piece of pipe over the free end of the rivet and tap the top of the pipe with a hammer to draw the rivet head and lining tightly in place. See that the end of the rivet extends about 3/16 in. through the band. Then rivet over the heads with light, sharp blows of a hammer. The method of doing this for the external brake is shown in Fig. 6 and for the in- ternal type in Fig. 7. Care should be taken in marking off the lining holes or, in case of the external brake, the lining may tend to cut corners as shown in Fig. 8. This may be avoided by leaving the holding-in bolts in place in lining and band until the other holes are filled with rivets.

��Popular Science Monthly

��A Cord Cutter Made From a Safety Razor Blade

THIS cord cutter consists of a discarded safety razor blade and a block of wood. If the cutter is to be used on the counter edge the block of wood should be consider- ably thicker than the coun- ter top. The lower edge of the block is placed flush with the under- side of the coun- ter allowing the extra thickness to project above the upper surface, which is notched in the center and cut slanting toward both ends. It is then fastened with two wood screws run through the holes in the razor blade. This manner of fastening allows a small portion of the blade to extend in the notch where the cord will strike it upon being drawn in the open- ing. — Thomas Dean.

���-Screws pass tnrougn block and razor blade Discarded razor blade used as a cord cutter

��Electric Lamp Attached to a Spoon for Tongue Depressor

WHEN it becomes necessary to examine the throat of a child, or to remove a lodged fishbone or button, a spoon is the first thing sought for to depress the tongue in order to make the examination. A good light is also necessary. To furnish one for the purpose, a small electric light may be attached to the back of the spoon.

This lighted spoon is not difficult to arrange. It requires only an ordinary spoon, a small two-volt lamp, a dry cell, a few inches of enameled wire — about

��18 gage — one insulated and one uninsulated binding post and 3 or 4 ft. of flexible cord. Scrape enough enamel from the ends of the wire to allow for soldering to the lamp and attaching to the binding post. Attach the posts on the end of the spoon handle. Solder the base of the lamp to the

���A small electric globe fastened to an ordi- nary table spoon for examining the throat

spoon bowl and the end of the enameled wire to the center button of the lamp. Connect wire attached to the center button on lamp to the insulated binding post. Enamel the base or back part of the lamp so that the light wHl be reflected into the throat and not into the operator's eyes. Attach the flexible cord to a battery and to the binding posts, and the spoon is ready for use.

If carefully made, this will prove to be an invaluable addition to the "first aid" equipment of the medicine cabinet. The spoon with the attachment can be sterilized in hot water. — E. A. Warner.

��Temporary Repair on a Broken Lubricator Filling Glass

A STEAM shovel located at a great distance from a repair shop had a broken lubricator filling glass. There were no extra ones on hand. The sketch illustrates how a small piece of wood was whittled and substituted for the glass. Though this did not register the use and supply of oil in the lubricator, it plugged the openings left by the broken glass satisfac- torily and held very nicely until new glasses arrived several days later. The wood should be cut as round as the glass to make a close joint at each end in the fittings. The nuts should be made secure. — F. W. Bentley.

���KWood piece

��A wood plug sub- stitute for glass

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