Hi Caren, Stuhr Museum in Grand Island, Nebraska has a working planning mill that uses overhead jack shafts and belts to power period machinery. It is electric powered rather than steam, but all the machiney is used for various projects. Visitors are kept back from the machinery by a stout picket fence near the doors of the mill. This, unfortunately, limits the amount of people who can enter at a given time to about 10 to 15. As to staff, the machinery does have some guards, but they have to watch the belts since they are exposed. People really do like to watch the gentlemen work in the mill and see how various items were made. If you have any further questions, email the museum at [log in to unmask] John Adamik Manager, Agriculture and Equine Programs The Henry Ford Dearborn, MI [log in to unmask] ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).