100 Great Perpetual Motion Machines and Similar Inventions

100 Great Perpetual Motion Machines and Other Inventions Arranged Alphabetically: This is what may be the first nearly complete tome of theoretically-working free energy inventions. 50 Great Flying and Underwater Perpetual Motion Machines is saved for another volume. Nathan Coppedge is an inventor like no other. Most of these creations are of Nathan's own invention, replete with simple as-easy-as-it-gets mathematics. Many of the diagrams provide critical information on how to possibly build the devices and make them work.