A small speed-lathe, suitable for turning wood or small metal articles, may be easily made at very little expense. A lathe of this kind is…
This is a box trap with glass sides and back, the panes of glass being held in place by brads placed on both sides. The…
The sounder, Fig. 1, is made from an old electric-bell magnet, D, fastened to a wooden base. The lever, A, can be made of brass…
Nearly everyone has heard of the pin-hole camera, but the fact that the same principle can be used to make a microscope, having a magnifying…
Secure a piece of tubing about 1-3/4 in. long that will fit the connection to the reproducer, and wrap a quantity of heavy thread around…
Rain Gauge An accurate rain gauge may be easily constructed from galvanized iron, as shown in the sketch herewith. The funnel, A, overlaps and rests…
Explore what is soil made of trough this experiment for kids. You will need: a handful of garden soil or forest floor soil water a…
Shut your eyes tight—all you can see is darkness. Now open your eyes again. If it is daytime, you will see that light is all…