K&E 4175 Psychrometric Slide Rule

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 28.0 cm,          Width: 4.1 cm,           Weight: 74.6 gms
Materials: Sinplex design; wooden body and slide, scales printed on painted surfaces
Cursor: 3.0 X 5.1 X 0.7 cms; metal framed glass lens; lines = single line, front side only
Scales: 11, specialized
Front: 1 (Total Heat / Lb. Dry Air Sat.), 2 (Wet Bulb & Dry Bulb) [ 3 (Dew Point 7 Dry Bulb), 4 (Sensible Heat B.T.U. / lb. Dry Air, 5 (Percent Relative Hunidity) ] 6 (Dew Point 7 Dry Bulb), 7 (Vapor Pressure In. of Hg), 8 (Lbs. / Cu Ft of Dry Air), 9 (Lbs. Dry Air / Cu. Feet Sat. Air), 10 (Grains / Lb Dry Air Sat.), 11 (Grains / Cu. Ft. Sat Air)
Back: Instructions for Use, constants, formulae
Slide Back and Well: blank
Gauge Marks: [      ]
Condition: C3 (Signs of Very Minimal Use)
Came with: Original black cardboard box

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