Nuclear slide rules and dials

I love slide rules and dial calculators, there are so many you rarely see the same one twice. These complex beauties are from a collection of Nuclear slide rules and dials gathered together by ORAU (Oak Ridge Associated Universities).

They've got dials to calculate radiation dosage, Nuclear bomb effects, Nuclear weapon effects, x-ray exposure, decay rates, treatment times and Radium exposure. A much more useful collection than mine, which mainly consists of vintage promotional pieces!

See the full collection of Nuclear slide rules here and see some of mine here.

Images copyright ORAU.
VIa Notcot.