Found this article today about a 250 year old mechanical pendulum clock design that keeps near perfect time (loses less than a second every hundred days). http://www.theguardian.com/science/2015/apr/19/clockmaker-john-harrison-vindicated-250-years-absurd-claims You may be asking yourself, "Why am I getting an email from a GIS listserv about a clock?" Well, it's because the clock designer was John Harrison, who was a leading figure in creating maritime chronometers for determining longitude for ocean going navigation. Very interesting man. Worth a Google search. Dan Daniel Czaja, GISP GIS Coordinator State of Connecticut Department of Emergency Services and Public Protection Division of Statewide Emergency Telecommunications 1111 Country Club Road Middletown, CT 06457-9294 Phone: 860.685.8131 Fax: 860.685.8363 [log in to unmask]<mailto:[log in to unmask]> "As with all mapping data, sometimes it is accurate, sometimes it is helpful, and once in a while, it is both." - S. Cobb ------------------------------------------------------------------------- This list (CTGIS-L) is an unmoderated discussion list for all CT GIS Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/ctgis-l.html