Heads up for folks in the DFW area. Nice show full of vintage and antique scientific equipment. Been there quite a few times and always interesting stuff on the tables for sale. ANTIQUE SCIENCE & RETRO-TECH SHOW & SWAP MEET<http://www.slideruleguy.com/tx-1q13.htm>is this coming weekend in Irving, TX. DFW Airport Hotel 972-399-1010 4440 W. Airport Freeway (Hwy 183) Irving, TX exit Valley View Lane 10:00 am to 4:00 pm $5.00 ADMISSION