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Slide Rule for Specific Speed of Hydraulic Turbines

L.E. Jones

This slide rule consists of a paper or plastic frame with a window in the middle through which the slide is read. Scales: Front: Specific speed, Head in feet, Horse Power, Revolutions per minute; Back: Formula for calculation of specific speed, its explanation and use. Also, there are conversion factors for units of pressure, weight, and length. Includes a leather case.

Accession Number: 2010.lej.11

Alternative Name:

Primary Materials: Laminated Paper or Plastic

Markings: Old inventory number = 11.

Dimensions (cm): Height = . 3, Width = 6, length = 26.6

Function: For facilitating calculations.

Condition: Item is in very good condition.

Associated Instruments:


William Hamilton Co. Limited, Peterborough, Ontario.

Date of Manufacture: c. 1848


Part of L. E. Jones slide rule collection.

Additional Information and References:

Historical Notes: