The Expanded and Annotated My Life and Work

part comes into it as raw material or as a casting, goes through the sequence 
of machines and heat treatments, or whatever may be required, and leaves 
that department finished. It was only because of transport ease that the 
departments were grouped together when we started to manufacture. I did 
not know that such minute divisions would be possible; but as our produc-
tion grew and departments multiplied, we actually changed from making 
automobiles to making parts. Then we found that we had made another new 
discovery, which was that by no means all of the parts had to be made in 
one factory. It was not really a discovery—it was something in the nature of 
going around in a circle to my first manufacturing when I bought the motors 
and probably ninety per cent of the parts. When we began to make our own