Slide Rule for Specific Speed of Hydraulic Turbines
Accession Number: 2010.lej.11
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.
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.
William Hamilton Co. Limited, Peterborough, Ontario.
Date of Manufacture: c. 1848
Part of L. E. Jones slide rule collection.