automatic production of electric bulbs represents a 
combination of processes that were previously managed by 
several machines. With a single attendant, it can run as 
continuously as a tree in its intake and output. But, unlike the 
tree, it has a built-in system of jigs and fixtures that can be 
shifted to cause the machine to turn out a whole range of 
products from radio tubes and glass tumblers to Christmas-
tree ornaments. Although an automated plant is almost like a 
tree in respect to the continuous intake and output, it is a tree 
that can change from oak to maple to walnut as required. It is 
part of the automation or electric logic that specialism is no 
longer limited to just one specialty. The automatic machine 
may work in a specialist way, but it is not limited to one line. As 
with our hands and fingers that are capable of many tasks, the 
automatic unit incorporates a power of adaptation that was 
quite lacking in the pre-electric and mechanical stage of