His cottage was quite a curiosity-shop of models of engines, self-acting planes, and perpetual-motion machines.
Closely associated with his book one also finds texts dealing with perpetual-motion devices, which we shall consider later.
A favorite idea with perpetual-motion seekers is the utilization of the force of magnetism.
This is what a perpetual-motion machine would be if such a machine were possible.
But we give the description in the language of the inventor, as a fair type of this class of perpetual-motion machines.
Many inventors of perpetual-motion machines offer their poverty as an excuse for not making a model or working machine.
In a sense it was the exact opposite of a perpetual-motion scheme, which pretends to get energy from nowhere.