http://news.bbc.co.uk/1/hi/business/6230194.stm
Plastic cards had not been invented, so Mr Shepherd-Barron's machine used cheques that were impregnated with carbon 14, a mildly radioactive substance.
However, Mr Shepherd-Barron denies there were any health concerns: "I later worked out you would have to eat 136,000 such cheques for it to have any effect on you."
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Imagine a world without them!
Rich
Plastic cards had not been invented, so Mr Shepherd-Barron's machine used cheques that were impregnated with carbon 14, a mildly radioactive substance.
However, Mr Shepherd-Barron denies there were any health concerns: "I later worked out you would have to eat 136,000 such cheques for it to have any effect on you."
---------
Imagine a world without them!
Rich