User talk:Professor Davidson

Hello, I'm Materialscientist. I wanted to let you know that one or more of your recent contributions have been undone because they appeared to be promotional. Advertising and using Wikipedia as a "soapbox" are against Wikipedia policy and not permitted. Take a look at the welcome page to learn more about Wikipedia. Thank you. Materialscientist (talk) 23:13, 25 December 2016 (UTC)