Box to Protect Extra Spark Plugs

Damage often results to spark plugs which are thrown in the tool box of an automobile, and the use of a small case for the extra spark plugs is desirable. Partitions may be fitted into an old box of suitable size, or a case may be specially made. That shown was designed to provide for six spark plugs in a minimum of space. It was made of ¹⁄₄-in. wood, and of a length so that the spark plugs could be slipped in the recesses only by turning the faces of adjoining plugs together. A hinged cover keeps them firmly in place.—E. R. Mason, Danville, Ill.