But what if a machine did everything people really don't want to do?
The machine should start looking for correlations we would not expect.
No matter how convincing the machine is, once I know it is a machine, I won't care about it anymore.
In the second case every axle in the train may be made a driving-axle if desired, in which case the locomotive as a separate machine disappears.
In some cases when a magneto-generator is employed for calling purposes the coil of the machine is automatically cut out of circuit when it is not in action, and is brought into circuit when the handle is turned by the operation of a centrifugal or other arrangement.