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Show . . . L : . : - I HANDICRAFT FOR BOYS AND GIRLS j Br J j A. NEELY HALL and DOROTHY PERKINS J I (Copyright, by A. Neely HalU A WIRELESS TELEGRAPH RECEIV-j RECEIV-j ING SET PART 2. .' The first thing to consider when set- ting up a "wireless" receiving set Is the aerial. This should be supported i at least 30 feet above the ground, at I Due end, and should be 50 feet or more I In length. Fig. 1 shows an arrangement for an ' aerial of six strands, and Fig. 2 shows " how- the connections are made fl-B fl-- BB fc-B &-B S-fi t I I 1 tl Any wire but steel or Iron, not smaller than No. 16, either bare or Insulated, may be used for the strands, and the end spreaders (A, Fig. 2) may be any light, strong poles 5 feet long. Insulators In-sulators must be set In between the spreaders and the ends of the wire strands (B, Fig. 2), and the strands must he fastened 12 Inches apart. Ordinary Or-dinary porcelain cleats (Fig. 3) make ' good insulators. Tie the supporting ropes C of the aerial (Fig. 2) to screw-eyes screw-eyes placed at the ends of the spreaders, spread-ers, and then fasten the rope stays D to them, and to the spreaders, so the spreaders will not become bowed. Fig. 5 shows a good pair of telephone receivers, "with head-band. If you cau-" cau-" tnot afford a pair, you can get along i I M Swnt i ! I ,f CONDENSER RECEIVERS' i JL-SILICON J O DETECTOR r--x-TUNING- COIL (g) QWUND C ROUND with a single receiver. Fig. 6 shows ithe kind of switch to buy a single-Ipole-double-throw switch. This switch jmust be placed outside of the window, jto provide for disconnecting the aerial jwhen the receiving set is not in operation, opera-tion, as a precaution against lightning. Fig. 4 shows the wiring diagram. One wire from the switch must be ground-led, ground-led, also, as shown, outdoors. The re-jceiving re-jceiving set must be grounded, and this grounding can be taken care of by connecting a wire to a radiator or plumbing pipe. i With the receiving Instruments Iproperly prepared and set up, and a good aerial with Its lead-in wire perfectly per-fectly Insulated, you should be able to receive from commercial stations at a distance of at least a hundred miles, and from all amateur stations in your vicinity. The two telegraph codes Morse and IContinental must be learned, because 'both are employed, though the Morse CODES MORSE CONTINENTAL code is the one In general use. The two are shown In the diagram of Fig 7. You will notice that In the case - iOf many characters the arrangements are similar. Tho dots of the codes will he heard through the receivers as 'Short buzzes, the dashes as long buzzes. As there Is great difference In the equipment of "wireless" sta-Itlons, sta-Itlons, your instruments must be !"tuned" before you can receive a mes-isage, mes-isage, by slowly sliding the sliders of Ithe tuning-coil back and forth, and occasionally oc-casionally adjusting the wire resting jupon the piece of silicon of the detec-jtor, detec-jtor, mtU the buzz are heard. A WASTE-BASKET, SHIRTWAIST BOX, AND SHOE BLACKING CASE, IN CRETONNE. On account of the simplicity of the construction of cretonne covered furniture, fur-niture, there are all sorts of thing! which a girl can make for her own room, and for mother's. ' The waste-basket in Fig. 1 is mads out of a soap box. Remove ono end of the box, as shown (n Fig. 2, for the open top of the basket, and nail the cover board In place to enclose the side (Fig. 3). The next step is to cut several strips about an inch and one-half wide, and nail them around the top edges as a finishing band. Tack the outside cretonne on first, then the Inside lining. Lap the cretonne cre-tonne over the top edge, and cut it so that about an inch will turn down all around. Then conceal the edge of the cretonne by lapping the lining over It. The lining may be of a plain colored cambric. The shirtwaist box shown in Fig. 4 is made of a box of the right height to slide underneath a bed, and a pair of handles are screwed to each of the two long sides, so it may be pu 1 out from either side of the bed. ; Because the shirtwaist box must be shallow. It is well to make It long. Having procured the box, It Is only necessary to fasten a strip two inches wide along the center of the open top, from end to end, for the hinge-strip A (Fig. 5), and hinge a board each side of it for the covers (B, Fig. 6). That completes the carpentry. It will be easiest to cover the box before the hinge-strip and covers have been put on, and to tack the cretonne on the hinge-strip and covers before fastening fasten-ing them in place. The handles and the castors go on last. Have you a shoe blacking case in your room? Very few girls do own one, yet it is an article of great tin- I Zi portance to the girl who is particular about keeping her shoes tidy. Fig. 7 shows a practical little blacking case. By making the top removable, the inside in-side of the case may be used as a receptacle re-ceptacle for cans and bottles of polish, brushes, and rags; and by padding the under side and covering it with cretonne, the top may be Inverted after aft-er use, and the blacking case thus converted into the attractive footstool shown in Fig. 8. Fig. 9 shows how four short legs should be nailed to the corners of a square soap box. with the tops projecting pro-jecting just enough to allow for the thickness of the cover, and Fig. 10 shows how the cover boards should be fastened together with the cross strips A. and hew a triangular block B should be nailed to It for a rest to push the shoe against. In covering the blacking case, It U beBt to omit the tojideUnlnj. |