Too loud reproduction from a record, the scratching noise sometimes heard and the forcing of the needle into a soft record, because the extension arm and reproducer are too heavy, can be remedied in the following manner: Attach a small ring to the under side of the horn and use a rubber band to lift the extending arm slightly.
Contributed by W. A. Jaquythe, Richmond, Cal.
How to Make a Thermometer Back in Etched Copper
Copper Thermometer Holder
Etching copper is not a very difficult process. Secure a sheet of No. 16 gauge copper of the width and length wanted for the back of the thermometer. In the design shown the extreme width is 3-1/2 in. and the extreme length 7 in.
Draw a design. The one shown is merely suggestive. The worker may change the outline or proportions as desired. The decoration, too, may be changed. The essential thing is to keep a space upon which to place the thermometer. This design is in what is known as two-part symmetry. A line is drawn down the paper and one-half of the outline and decoration worked out. This done, the paper is folded along the center line, a piece of carbon paper is inserted between the folds and the design transferred on the inner surfaces by tracing with a pencil over the half of the outline previously drawn. Trace the design and outline upon the metal, using the carbon paper.
Cut out the outline with metal shears and file the edges smooth.