Enlarging Pictures
A very simple and sufficiently accurate way of enlarging pictures by means of a pencil holder and elastic is shown in the illustration. The picture to be enlarged is fastened to a table top or drawing board, and the paper on which it is to be drawn is placed directly below it. A small brad or tack is driven into the board at A, the location depending on the desired size of the enlarged picture, and the elastic is attached to it. The pencil holder B is fastened to the other end of the elastic over the drawing paper. A pointer, or a knot, is placed in the elastic at C. The pencil holder consists of a stick of wood turned into a handle with a hole bored centrally for a pencil.
The Size of the Enlarged Picture Depends on the Length of the Elastic and the Spacing of Pencil and Pointer
In use, the pencil is moved over the drawing paper while the knot or pointer is watched, to keep it following the lines of the original drawing. The stretch of the elastic is sufficient to enlarge the parts equally, as well vertically as horizontally.—Contributed by Wm. Weitzsacker, Buffalo, N. Y.
Distance Chart for Wireless Stations
The amateur wireless telegrapher may be troubled more or less regarding distances from other stations. The difficulty can be overcome by following a plan similar to that of a parcel-post map. A map should be selected covering the desired territory. With the home station as center, circles should be drawn to diameters corresponding in length to the scale used on the map. By measuring the distance other stations may be from any of these circles, their cross-country distance from the home station can be determined at a glance.—Contributed by E. L. Hartlett, Wausau, Wis.
Circles on a Map the Same as for Parcel Post to Designate Wireless Distances