Popular Science Monthly 



443 



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 

 V X 1/4'' X I'', which is through the arm, 

 allows the arm to move freely on the 

 connecting rod pin. The pin is nothing 

 but a W bolt, ii V' long. _ 



The receving tank used is made from 

 an old hot water boiler usually found 

 in homes where the hot water is not sup- 

 plied 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 l-)4" 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. 



A few curved nails in the rim solve the 



problem of keeping a sack open while it 



is being filled 



By the use of this device, one man 

 can do the work of two and in less time, 

 with practically no outlay. 



I 



How to Saw Difficult Angles on Small 

 Stock 



N 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 \'-j, in. by 



The cleats and the drawing take the place 

 of a very rigid miter-box 



'^'■2 in. by 3 in. were cut with bevels to 

 form an eight-sided box, built up of 

 these pieces as a child builds up dom- 

 inoes. The pieces were so accurately 

 cut that they went together perfectly. 



The drawing is first made very ac- 

 curately, then blocks No. 1, 2, 3, 4, are 

 nailed on the board along the diagonal, 

 h^nough 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. 



