Chicago : [Popular Engineering Pub. Co.] · leaf 261
ex-Chief Forester Pinchot caused telephones to be installed in connec- an author to record a sudden midnight tion with the patrol system. Immediately inspiration, the sleuth to sketch a plan on the after a fire made its appearance aid was spot; in fact many instances arise where the summoned over… … length of the bench is shown in the accom- COMBINED PENCIL AND LIGHT panying illustration. Two brackets (A) either of wood or iron may be placed on the where needed. By turning the screw at the wall above the bench and a wire (B) stretched top the light is switched on. When the tightly between…
Electricity
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