The handholds on stone jars are usually not large enough to carry the jars safely when they are full. If the handles of an old galvanized tub are riveted to a leather strap long enough to reach under the bottom and almost to the top on each side, the jar can be handled without danger of being dropped. The fingers are placed in the handles to carry the weight, while the thumbs are used to keep the jar from tipping. By placing a buckle near one end, the strap may be used for carrying a jar of any size.—Contributed by C. H. Floyd, Elwood, Ind.

Vibrator for a Spark Coil

If you do not have the time to make a vibrator or electrolytic interrupter for a spark coil, a common electric door-bell makes a good substitute. Connect one of the primary wires to the binding-post of the bell that is not insulated from the frame, and the other primary wire to the adjusting screw on the make-and-break contact of the bell, as shown in the sketch. The connections are made from the batteries to the bell in the usual manner.—Contributed by Ralph Tarshis, Brooklyn, N. Y.

Bell Used as Vibrator

Head Rest for a Chair

While seated in a chair a person very often desires to lay the head back in resting. A support for the head is lacking in the low-back rockers and ordinary chairs. A detachable, padded support can be easily made at home for placing on any low-back chair and used as a head rest.

Rest on Chair Back

The support standards can be made of wood or metal as desired. If metal is used, the rest will have some springiness, which combined with the pad will insure much greater comfort than the hard rigid back. A cloth or paper is placed over the back of the chair to prevent marring of the varnish or wood.