BRL P1943 Hydraulic Slide Rule for Weirs, Notches, and Orifices

---

Country of manufacture: England,            Date of manufacture: ____
Overall length: 28.7 cm,          Width: 4.6 cm,           Weight: 73.8 gms
Materials: plastic (PVC) stators and slide, plastic end braces glued onto back
Cursor: 3.5 X 5.0 X 0.4 cms; all plastic; lines = single line,front only
Scales: 13, specialized
Front: Orifice Diameter (in inches and cm), Rectangular Weir Length (in meters and feet), angle of V-notch (in degrees) [ Weir Head (in inches and cm), Orifice Head (in inches and cm) V-notch Head (in inches and cm), gauge marks for types of notches and weir mouths ] Flow (in cu ft/sec and cu M/Hr)
Back: Instructions for use
Gauge Marks: [       ]
Condition: C5 (Normal signs of use)
Came with: Original teal cardboard box (labeled: "Tarrant Hydraulic Slide Rule for Weirs, Notches, and Orifices, supplied by Patterson Egineering Company, Limited, Kingsway, London
Notes: Method for weirs and V-notches uses the Gourley and Crimp formula; method for combined notch and weir uses the Gourley formula

---

---