How to Preserve Egg Shells
Many naturalists experience difficulty in preserving valuable egg shells. One of the most effective ways of preserving them is as follows: After the egg is blown, melt common beeswax and force it into the shell with a discarded fountain pen filler. Set in a cool place until the wax hardens. The most delicate shells treated in this manner can be handled without fear of breaking, and the transparency of the wax will not alter the color, shading, or delicate tints of the egg.
Contributed by L. L. Shabino, Millstown, South Dakota.
Homemade Phonograph
Phonograph and Construction of Parts
Make a box large enough to hold four dry cells and use it as a base to mount the motor on and to support the revolving cylinder. Anyone of the various battery motors may be used to supply the power. The support for the cylinder is first made and located on the cover of the box in such a position that it will give ample room for the motor. The motor base and the support are fastened by screws turned up through the cover or top of the box. The location of these parts is shown in Fig. 1.