Page:Popular Science Monthly Volume 89.djvu/936

 922

��Popular Science Monthly

��A Clever Trick Performed with a Lighted Cigarette

ACIGARETIK is ligliud and tucked into a closed fist from which it vanishes while still burning. The effect is mystifying, but the method is simple. Take a wood spool and whittle awa%' both edges

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��The lighted cigarette is stuck into the spool which is drawn back into the vest- pocket by an elastic

���the celluloid and lay the foil on, mercur>- side down. Cover with a piece of news- paper. Hold it tigiit to pre\'ent slipping, and burnish the foil tlown liard to the cellu- loid surface. This may be done with the end of a round paddle made of wood, or a similar hard surface.

When this has become dry a fine

mirror will be the result. It may

be twisted in almost any wa%" so

that it makes a very amusing device

for distorting a person's

rollection in all kinds of

siiai:)cs, making tall people

look ridiculously scjuat, and

short, stout people look tall

and lank.

Care should be exercised not to liend the celluloid too sharply as the foil will be wrinkled and the elTect spoiled in consequence.

��so that it represents a tube-, one end ha\ iii,., a tapering point. Drill a hole crosswise through the tapering end; pass one end of an elastic cord about 2 ft. long through the hole and tie it. Tie the opposite end to a suspender button. The \cst conceals this clastic, which when taut is just long enough to allow the spool to rest inside the lower vest-pocket.

The trick is performed as follows: Borrow a cigarette and reach with the left hand into the designated vest-pocket for a match. In pulling out the match take the spool with it, concealing it in the fingers. Stand slightly sideways so that the coat will hide the elastic. Tuck the lighted end of the cigarette into the hole in the center of the spool — it is just large enough to hold the cigarette snugly without extinguishing it. Open the fingers and the spool containing the cigarette will fly back beneath the coat. — MHURnr H.vle.

��Grinding Automobile Engine- Valve Seats Set in a Sleeve

ASIMPLE and spccd>- way to grind automobile engine-valves set in a slce\e is to fasten the stem in a vise, take a length of rawhide and wrap it once or twice around the sleeve as shown in the illustration. Fasten the ends of the raw- hide into a hacksaw frame and draw it

���Making Flexible Mirrors from Tinfoil on Celluloid

PROCl'RI-: a piece of celluloid — an old photographic film cleaned of the gela- tin coating will suffice — and coat it as follows: Make a solution of ,'.j leaspoon- ful of plain while gelatin in yi cupful of boiling water. Take a piece of tinfoil — not le.id foil — :in(\ rub a few drops of mercury or f|uick silver on one side until it resembles a mirror. Wet the fingers in the preijared gelatin, size and rui) it all over the surface of

��Turning the valve-sleeve about the valve stem in grinding the engine-valve seat

back .mil finili ilie same as in sawing metal. A turning motion is imparled to the \alve-slee\e, wiiich will grind in a new seat (|uickl\- with the ii.se of iir<iperl\- a]')plied abrasi\-es.

\\'hen fastening the stem in the \ ise be sure to use some soft metal on the jaws, such as copper or lead, to prevent injure- to the surlace.

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