Do It with Tools and Machinery 



A radius gage for measuring the concave and convex surfaces of tools 

 and dies. Instead of having small -leaves it has eight small blades 



A brick and concrete drill 

 made of a steel tube or 

 segment of pipe. It is cut 

 off at an angle, as shown 



A lock washer which over- 

 comes the loosening of 

 nuts by vibration. It is 

 made in hexagon shape 



An attachment for re- 

 grinding thread - cutting 

 dies of button type or lap- 

 ping out holes in punches 



A new joist lifter. The handle is 

 raised until the dog engages the tooth 



Daniel Boone up to date. When the fire 

 will not start use the automobile pump 



