Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Linear / Disks
Duct Slide Rule
Datalizer for Air Conditioning Contractors of AmericaUSA
Plastic
c. 200521.5 cm x 28 cmCooling Industry

Notes: Used to calculate ducting requirements including some interesting on-linear scales


Image 1




Image 2