Laying Out a Dovetail Joint
With dividers and compass lay off the width of the board into twice as many parts as the dovetails wanted. Draw a light line, AB, across the board as far from the end as half the thickness of the board. On this line step off the divisions with the dividers, beginning with a half space or division. With the bevel square, set to a bevel of 1 in. in 3, draw lines through the division dots. This method will save much time and give accurate results.—Contributed by Joseph F. Parks, Wichita, Kan.
Oiling Bright Parts of Machinery
It is my duty to go over the bright parts on the machinery in my father's shop and give them a coat of oil late in the afternoon to prevent any rust accumulating over night. As the work took considerable time from my playing I thought of a plan that not only reduced the amount of work but applied the grease much better than with a brush or rag. I procured a sprayer, as shown in the sketch, and sprayed the oil on the bright parts.—Contributed by Waller Kaufman, Santa Ana, California.
A Sprayer Filled with Oil Makes a Good Device for Coating the Bright Parts of Machinery
Window Ventilator to Prevent Drafts
The ventilator consists of a piece of wood, about 8 in. wide, 3 in. thick and as long as the window is wide. Holes, 1-3/4 in. in diameter, are bored at regular intervals into one edge and these are connected with openings from one side as shown. The piece is set under the lower sash with the long openings toward the outside. This will direct the incoming air currents upward into the room.