W. A. Thomas Universal Hydraulic Sliderule

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Country of manufacture: Germany,            Date of manufacture: >=1927
Overall length: 20.0 cm,          Width: 4.9 cm,           Weight: 22.7 gms
Materials: all plastic; clamshell design
Cursor: 2.5 X 5.0 X 0.4 cms; all plastic; lines = one on front only
Scales: 14, specialized
Front (of outer shell): Top Edge: H. (Viscous Liquids, Water & Steam: Water Ft/Steam Lbs per sq in/Vis Liqs lbs per sq in per 1000 ft), A: (Air & Gas: Low Press Air & Gas Inches of Water, High Press Air & Gas Lbs per sq in)
                                   Bottom Edge: Q: (Water Gals per Min/Steam Lbs per Min/Air & Gas Hundreds of Cu Ft per Hour, Viscous Liqs BBLs per Hour)
Slide: BBLs Per Day/Gals per Min/Cu Ft Per Sec, K: (Orifice Discharge Coefficients for Water), L: (Water Ft/Sream Ft), Z: (Degree of Turbulence for Viscous Liquids), B: (Low Press Air & Gas Hundreds of Ft/High Press Airt & Gas Miles), S: (Superheat °F), C: (Mean Gage Press Steam Lbs Per Sq In), E: (Sp. Gr. Gas-Air, Liqs-Water), F: (Mean Gage Press High Press Air or Gas Lbs Per sq In), X: (Diam. Orifice Inches), D: (Diam Pipe Inches), Diam Std Elbow Inches/Equiv. Length Straight Pipe Ft
Back: Instructions for Use
Gauge Marks: [       ]
Condition: C4 (Minimal signs of use)
Came with: Original paper sleeve, manual;

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