Page:Popular Science Monthly Volume 88.djvu/471

Rh pin and the other as the connecting rod pin. The end should be rounded off to give the arm play in the bottom of the base. Stop pieces prevent the arm from being pushed or drawn too far. A slot 1″ × ¼″ × 1″, which is through the arm, allows the arm to move freely on the connecting rod pin. The pin is nothing but a ¼″ bolt, 1½″ long.

The receving tank used is made from an old hot water boiler usually found in homes where the hot water is not supplied by the house.

If a pump is made in this way it will surely give great satisfaction.

Gage for Duplicate Hole Drilling

DRILL the hole to the required depth and measure the distance exposed on the auger bit. This distance is taken from the face of the work to the end of the jaw protruding from the chuck of the brace.

Secure a block, say 1¼″ or 2″ square, which is as long as the distance previous- ly measured. Drill through this block and allow it to fit over the auger bit, acting as a sleeve. The only exposed part of the auger bit will then be equal to the depth of the required hole.

A Barrel for Filling Sacks

THE clumsy performance of holding a sack and filling it at the same time can be simplified if the sack is hung in a barrel. Four curved nails are placed at equal distances in the rim, and the sack is suspended from these. When it is filled, the sack can be easily removed.

By the use of this device, one man can do the work of two and in less time, with practically no outlay.

How to Saw Difficult Angles on Small Stock

IN making a craftsman lamp, a very rigid miter is needed to cut unusual angles on small stock. If no miter box is at hand, the following device may be substituted. Use a smooth board about 1 in. thick and 18 in. sq. as a drawing- board and lay out the work directly on this board. Nail on cleats as indicated and the miter is ready for use. It is possible to secure very great accuracy and rigidity with very little trouble. In the case of one lamp, 44 pieces ½, in. by

½ in. by 3 in. were cut with bevels to form an eight-sided box, built up of these pieces as a child builds up dominoes. The pieces were so accurately cut that they went together perfectly.

The drawing is first made very accurately, then blocks No. 1, 2, 3, 4, are nailed on the board along the diagonal, enough room for the saw kerf was left holding the saw in position against Nos. 2 and 4 before nailing on Nos. 1 and 3. A and B are now nailed on, allowing just enough room for the stock. The first cut trims the first end on the stock, at the same time removing the surplus ends of A and B. Care must be taken that blocks 1, 2. 3. 4 are right-angled on the sides. — E. A. Hodgson.