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Was the U.S. Twelfth President Poisoned by Arsenic?
7 hours ago ago from The Louisville 10 - Top Ten Lists of the Best Restaurants, Businesses, Services, and Everything Else You Can Imagine in Louisville, KY
The compounds of arsenic have been known since at least the days of Ancient Greece and Rome. They were used by physicians and prisoners. The compound most often used for both purposes was arsenic sulfide (As23). Arsenic was first recognized as an element by alchemists. Alchemy was a kind of pre-science that existed from about 500 B.C. to about the end of the 16th century. People who studied alchemy, alchemists, wanted to find a way of ...
Related contentSilver – the element of mirrors
11 hours ago ago from publishedrage.com
Mirror is an object with at least one polished, and because of that, specularly reflective sufrace. Mirrors are usually manufactured by applying a reflective coating to a suitable substrate. The substrate that is most often used nowadays is glass, because of its transparency, ease of fabrication and rigidity. The reflective coating is mostly silver based, although there are some other chemical compounds involved in the composition of the ...
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