Such a Commotion If you would like to play a trick on a friend, send him one of these contrivances in an envelope. It consists of a stout card, folded into three. To the card is fixed a U-shaped piece of wire, held firmly in position by means of a gummed label. At each end of the wire is an …

A Useful Gadget This gadget has dozens of uses. It will be invaluable if you do leather work and have to prick a number of spaces all equidistant, say when thonging. It will come in handy when you have to rule a number of lines with equal spaces between them. And, it would be easy to suggest a score of …

Marking Out Tennis Football and Other Pitches It is a very tedious job to mark out tennis courts and football pitches if you do not posses an expensive machine for the purpose and you employ the ordinary hand method. The white lines can be made easily and well, however, if you construct a board like that shown in the illustration. …

A Saucepan Holder for Campers Don’t burn your fingers any more when lifting a can of boiling liquid from the camp fire. Cut a fork of the shape shown in the illustration from a bush or tree. Note the notch indicated by the arrow. When you want to lift a can from the fire and pour out its contents, slip …

A Comfortable Seat for Campers Nobody expects camp-life to be as comfortable as things are at home; but we have often felt, when camping, that a nice springy seat would be a pleasant change to the hard unyielding ground. If you want to fit up a comfortable camp seat, take three stout poules. Scouts will, of course, use their poles-place …

The Realistic Snake Most people do not like snakes, though the majority of them are quite harmless, and all are scrupulously clean. If you would like to make one that nobody will object to, go out in the autumn and collect from under the oak-tress a handful of acorn cups. When you have brought them home, grade them according to …

A Feather Glider Some boys are never so happy as when they are devising gliders and flying them. A good many ingenious patterns have been thought out, and the one described here is as good as any we have seen. Take a piece of cane about eight inches long and to each end fit a cork, holding it in position …

We all use computers. If you use Windows on your machine, like me, you will have a small button at the the bottom of your screen called ‘Start’. Every machine in the world which has the Windows software installed has to have that button. However, we can have different screen colours, different text sizes, wallpapers etc. Similarly our bodies are …

In London a moment of historic pageantry was celebrated on this day-the Coronation of Queen Elizabeth II. It was also the day when London heard the news of the conquest of Mount Everest’s 9,608 m by Edmund Hillary, a New Zealander, and Tensing, the famous Sherpa porter from Nepal. The London Times wrote: ‘Seldom since Francis Drake brought the Golden …

The principle of the thermocouple was first described by Seebeck in 1821. Seebeck discovered that when wires of two dissimilar metals were joined together to form a circuit of at least two junctions, a current would flow when the junctions were at different temperatures. This phenomenon, called the Seebeck Effect, is the basis upon which thermocouples are designed.