I would like to discuss which components would be needed for and how expensive
a reproduction attempt of Holmlid and Olaffsons experiment would be.
I am not sure about the prices for excess pressure chambers. Probably a few hundred €/$ should be sufficient. But does anyone have an idea where to buy an affordable yet sufficient vacuum chamber?
I found this one for example: http://www.ebay.de/itm/like/231551817812?lpid=106&chn=ps&ul_noapp=true
150 € would not be too much.
But what about the Hydrogen or Deuterium? Is it too dangerous?
I guess the potassium-doped iron oxide catalysator will be the cheapest component and fortunately completely harmless.