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<p>[QUOTE=&quot;Conder101, post: 4530494, member: 66&quot;]When I was there in 1967 it was an unattended exhibit, meaning just signs, no one there to explain things.&nbsp; You walked up a set of steps and put your dime in (I don&#039;t remember any signs saying the dime had to be dated 1964 or earlier)&nbsp; The dime rolled down a plastic chute in a tank of water and stopped next to the neutron source in the center of it.&nbsp; After a little bit it was released and continued rolling down the chute and dropping into a return chamber.&nbsp; You picked it up, put it in the plastic ring, into the aluminum shell, and put a plastic disc over it.&nbsp; You then put it in another machine that rolled it slightly crimping the shell a little to keep the plastic disc in place.&nbsp; I don&#039;t remember where the geiger counter was located.&nbsp; But of course my 1965&#039;s didn&#039;t elicit a response.&nbsp; I didn&#039;t think anything of it at the time, I didn&#039;t realize they were supposed to be made radioactive.&nbsp; (Cut me some slack, I was six years old.)&nbsp; even if there had been a sign saying the dimes need to be 64 or earlier I wouldn&#039;t have understood why.&nbsp; I had become interested in coins the previous year, but in 1966 there weren&#039;t any coin books out there available to me that said ANYTHING about clad coins.</p><p><br /></p><p><br /></p><p>Yes but back in the EARLY days it&#039;s dangers were not known.&nbsp; The shoe fluoroscopes were popular in the 30&#039;s, 40&#039;s and less so in the 50&#039;s.&nbsp; In the early days radiation and radioactive substances were considered energy booster and were used as health aids.&nbsp; Radium infused water was a popular item.&nbsp; They had radium toothpaste etc. (radium was considered to be THE big health item and there were a LOT of patent medicines that contained radium.)[/QUOTE]</p><p><br /></p>

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