User talk:129.171.150.78

April 2009
Welcome to Wikipedia. The recent edit you made to Atrium (heart) has been reverted, as it appears to have removed content from the page without explanation. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. ZenerV (talk) 15:01, 20 April 2009 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did with this edit to the page Atrium (heart). Such edits constitute vandalism and are reverted. Please do not continue to make unconstructive edits to pages; use the sandbox for testing. Thank you. NuclearWarfare  ( Talk ) 15:05, 20 April 2009 (UTC)

March 2011
Welcome to Wikipedia. Everyone is welcome to contribute to the encyclopedia, but when you add or change content, as you did to the article Principal component analysis, please cite a reliable source for the content of your edit. This helps maintain our policy of verifiability. See Citing sources for how to cite sources, and the welcome page to learn more about contributing to this encyclopedia. Thank you. GcSwRhIc (talk) 16:05, 11 March 2011 (UTC)
 * If this is a shared IP address, and you didn't make the edit, consider creating an account for yourself so you can avoid further irrelevant notices.