User talk:65.8.204.178

December 2010
Welcome to Wikipedia. The recent edit you made to Mechanical wave has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. Alansohn (talk) 17:39, 21 December 2010 (UTC)