Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
AGFA Gamma Ray Exposire Calculator
American Slide-ChartUSA
19998 x 21.2 cmGamma Ray Exposure

Notes: 1) Used to predict film exposure times for Iridium 192 on the front side 2) Used to predict exposure times for Cobalt 60 on the reverse side 3) Note - the slide rule has 2 slides 4) Made by an unknown company in Denmark for Tech Ops in the USA

Image 1

Image 2

Image 3