Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Disk
NCPI
PerrygrafUSA
Cardstock
c. 1977dia. = 16 cmIndustrial Sanitation

Notes: "1) Gravity flow hydraulic calculator 2) Provides extensive moving scales for pipe diameter, flow rate, slope and other related calculations 3) Uses Manning's Formula for hydraulic flow calculations 4) Made for the National Clay Pipe Institute"


Image 1




Image 2