Aristo 90193 Bopp & Reuther Venturi Slide Rule

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Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 33.9 cm,          Width: 4.8 cm,           Weight: 126.6 gms
Materials: plastic (PVC) stators and slide, glued-on plastic end braces
Cursor: 3.8 X 5.9 X 1.0 cms; plastic runners holding plastic lens, slightly magnifying, removable, adjustable; lines = two on front, three on back
Scales: 25, specialized
Front: water/steam temperature t(η)°C, η 10⁶kps/m², ν 10⁶ m²/s, x² [ D mm Φ, γ kp/m³; ν10⁶ m²/s, G t/h; q_νm³/h, x ] x, * W m/s, Re_D, * D mm Φ
Back: ζ, (d/D) Viertelkreisduse, (Δp_v/Δp) Blende Duse, (Δp_v/Δp) Normventuriduse, q_m t/h [ Δp mWS (1m WS=10³ kp/m³), ε K, ζ u.(ΔP_v/ΔP) bzw. γ₁kp/m³, D mm Φ ] (d/D) Normblende, (d/D) Normduse, (d/D) Normventuriduse, (d/D) klass. Venturirohr
Gauge Marks: [       ]
Condition: C3-C4 (Very minimal to minimal signs of use)
Came with: Instructions in German, white/light gray plastic case

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