Here's a fellow using a BIG tuning fork frequency standard in 1929 for some industrial data acquisition system using 16mm movie film as the medium...
http://www.shorpy.com/node/4218?size=_original Then feel free to look at all the photos on the site - they're fascinating. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
