Do It With Tools and Machinery 



The ring on the bot- 

 tom of this oil gun 

 makes it possible 

 for you to pull out 

 the indentation 

 caused by the pres- 

 sure on the bottom 



A universal counter- 

 bore which can be 

 used for boring 

 holes, countersink- 

 ing, hollow milling, 

 drilling and facing 



The center picture 

 above shows a direct 

 connected electric 

 motor drive grinder 

 in which one end of 

 the arbor takes a 

 wet wheel and' the 

 other a dry one. It 

 also has a con- 

 venient catch basin 



A post-hole digger 

 operated from the 

 engine of an auto- 

 mobile. It did the 

 work of a dozen men 



Truing a journal on the shaft of a car truck without 

 removing it from the car or tracks. The machine 

 that did the work was run by compressed air 



At left: An 

 orange juice 

 extractor 

 made frorr^a 

 cast alumi- 

 num tea ket- 

 tle. The 

 reamer turns 

 inside of 

 the kettle 



710 



At right: An 

 adjustable 

 step form for 

 concrete 

 steps. It is 

 easily set at 

 the proper 

 pitch and can 

 be used by 

 an amateur 



