If the wire runs on a diagonal between the directions mentioned, and the needle is deflected toward the west, he current is flowing from the quadrant between N and W on the compass dial toward the quadrant between S and E. If the instrument is held over the wire and the needle is deflected toward E, the polarity is the opposite to that last indicated. Should the instrument be held below the wire, if the needle goes toward W, it is equivalent to going toward E when above the wire.—H. Sterling Parker, Brooklyn, New York.
¶If the white of an egg is used to seal an envelope which has no mucilage on the flap, it cannot be opened by steaming it.
Flash Light Used as a Bedroom Night Light
To save groping about in the dark for my flash light when suddenly awakened in the night, I devised the arrangement shown in the sketch and by which a “flash” is used as a wall night light, without lessening its common uses. The holder B and the board A are of wood, and into the box is fitted a metal clip, C, to hold the light. A round hole of proper size is cut through the top of the box and the light set through it so that the bottom end rests in the clip, the tin ferrule pressing against it firmly. A light spring, D, makes contact with the upper terminal of the push switch without closing it. The apparatus is fastened to the wall, and insulated wires, soldered, one to the clip C, and the other to the spring D, are connected to a switch placed in a convenient position. This switch replaces that on the light. The ceiling serves to reflect and distribute the light rays.—B. L. Dobbins, Harwich, Mass.
Pie-Plate Gas Heater
A satisfactory gas heater to take the chill out of the air in a small room by fitting a pie plate over a gas burner was made by me, as shown in the sketch. The wires which formerly held the glass shade were fitted into holes punched in the rim of the plate. It could thus be removed quickly when not needed and the glass shade put back in place.—Morris Tinsky, Chicago, Illinois.
A Folding Table with Split-Bamboo Tray for Top
