Talk:rubber policeman

why is it called a policeman i understand the rubber part


 * Lost in the mists of time - The Oxford English Dictionary has "1888 A. A. BLAIR Chemical Analysis of Iron 25 A piece of soft rubber tubing on the end of a piece of glass rod or sealed glass tube...This little instrument has acquired the name of ‘policeman’." SemperBlotto 16:46, 19 August 2008 (UTC)