EasyR Hydraulic Slide Rule

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Country of manufacture: England,            Date of manufacture: ca 1907
Overall length: 15.5 cm,          Width: 3.1 cm,           Weight: 174.7 gms
Materials: Cover of folder is red leather; rule is cardboard.
Cursor: no cursor
Scales: __ , specialized
Front:
Slide Back:
Well: blank
Gauge Marks: [       ]
Condition: C3 (Very Minimal signs of use)
Came with: nothing
Notes: Front face of the rule provides for calculaton of water flows in circular and egg-shaped sewers using the Kutter formula; rear face (slide back) uses the Crimp & Bruges formula. To see an example of use, visit Ron Manley's site

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Cover of Folder:


Folder open:


Slide Back:

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