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<p>[QUOTE=&quot;Just Carl, post: 571740, member: 4552&quot;]Not completely true as to a few more dings, dents and damage won&#039;t really effect the value. You should see how people examine coins at coin shows. And they tell the dealers of every one of those little imperfections. Of course this is normal method of haggling down the prices. </p><p><br /></p><p>Now with a little more boring thermocouple information. Approximatations of temperatures is normally done with the two different instrumentation wires run in only steel conduits to a device called a swamping box. This is layed out in the usual C&amp;I divisions of Electrical Engineering organizations for averaging or approximations of temperatures in seveal locations. </p><p>Examples are placing several thermocouple heads on the walls of a building in different locations. </p><p><br /></p><p>Back to your coins not corroding over time. Remember that the effect being discussed is a temperature changing effect on the metals. If such a container is kept in a fairly constant invironment, not much would happen. Metals are effected by humidity, temperature, miscellaneous gasses expecially Oxygen and even some types of light.[/QUOTE]</p><p><br /></p>

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