Why Not Do It with Tools 

 and Machinery? 



A large high speed autouialic 

 metal saw with a compartment 

 for holding lubricating compound 



This one-half horsepower motor 

 is geared to move thirty ton 

 cover from telescope mounting 



Direct reading micrometer hav- 

 ing disk that can be accurately 

 read at distance of several feet 



542 



