Mear Water Flow Calculator for Stewarts and Lloyd

Country of manufacture: England,            Date of manufacture: ____
Diameter: 12.7 cm,      Weight: 84.7 gms
Materials: all plastic
Scales: numerous, specialty
Front
     Outer Disk: Flow (.02-1,000), Flow (80-4,000,000) , Velocity (ft/sec), Pipe Bore, Actual Bore versus Outside Diameter in inches for Steel Pipes
     Inner Disk: Actual Bore of :Pipe (inches), Pressure Loss per Thousand Feet
     Cursor: Selection indicators for Flow in either cu ft/sec, Millions of US gallons/day, or Millions gallons per day, US gallons per hour, US gallons per minute, gallons per hour, gallons per minute, Selection indicators for Pressure Loss per thousand feet in feet of head, and Pressure Loss per thousand feet in pounds per square inch
Back
     limited circular slide rule: C [ D, A ] B
Condition: C4-C5 (Minimum to Normal Signs of Use)
Came with: Blue plastic slipcase w/snap closure
Notes: This calculator solves the Blair formula for the flow of water in bitumen lined steel pipes.