Aristo 918 Sewer System Slide Rule, System Vicari

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Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 30.0 cm,          Width: 4.1 cm.,           Weight: 102.7 gms.
Materials: All plastic, closed form simplex
Cursor: 4.2 X 3.7 X 0.6 cms; metal framed glass lens; lines = one
Scales: 15
Front:
Back: Physical & mathematical constants, conversion factors
Slide Back:
Gauge Marks: [      ]
Condition: C4 (minimal signs of use)
Came with: Original dark green cardboard box
Note: Calculation of sewers according to the simplified Kutter formula with n=0.35 circular and ovoid sewers with h/b = 3/2, full and partial filling. System Vicari
For more info on hydraulic slide rules, see this website by Prof. Dr.-Ing. Stefan Heimann.

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Back of Slide

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