American Gas Journal Low Pressure Gas Flow Computer

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Country of manufacture: USA,            Date of manufacture: ____
Diameter: 12.6 cm diameter disk mounted on 15.8 X 19.1 cm square back.
Materials: Heavy, coated cardstock
Cursor: Two, heavy coated cardstock, with scales
Scales on Backplane: Cubic feet of Gas per hour, Constants
Scales on Cursor One: Specific Gravity, Length of Pipe in Feet
Scales on Disk: Diameter of Pipe in Inches, Pressure Loss in Inches of Water
Scales on Cursor Two: Section Scale
Back: blank
Condition: C0 (Mint condition with all accessories)
Came with: Original white plastic folder with instruction sheet

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