Perpetual Motion Apparatus
Here is an article by Philip Rowland explaining the allure of the idea of perpetual motion. He provides several examples.
The Undying Lure of Perpetual Motion
Sep 162010
Riding an Elk
This short item describes Buck McKee riding an elk. I would have thought this was impossible!
Any comments?
Sound Magnifier
Here is an early idea for magnifying the sounds emanating from a cello. It uses no electricity! I don’t know how it sounds – perhaps someone can run an experiment and find out.
Magnifying the Strains of a ‘Cello
Any comments?
German Helmets Road
Here is an interesting idea from post-WWI England. This road is paved with German helmets. I guess there are many ways of turning swords into plowshares. 
Paving an English Road with German Helmets
Any thoughts?
