Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Perrygraf CorporationUSA
Plastic & Cardstock
196510cm x 27.1cmBlackbody Radiation

Notes: 1) Used for infrared radiation calculations 2) Made for General Electric 3) Widely distributed throught out the engineering community 4) Model 15-B was an updated version of the A model

Image 1

Image 2

Image 3

Image 4