User talk:80.111.142.163

January 2023
Welcome to Wikipedia. Although everyone is welcome to contribute to Wikipedia, at least one of your recent edits, such as the one you made to Ultimate tensile strength, appears to have been inappropriate, and has been reverted. Please feel free to use the sandbox for any test edits you would like to make, and read the welcome page to learn more about contributing constructively to this encyclopedia. Thank you. ''We don't remove a reference merely because it is no longer available. Please read WP:DEADREF. If you look at the article you will see that I have added an archive url. -'' David Biddulph (talk) 02:05, 22 January 2023 (UTC)

May 2024
Hello, I'm MichaelMaggs. I noticed that you added or changed content in an article, Invention, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Thank you. MichaelMaggs (talk) 16:32, 13 May 2024 (UTC)