Circular ready reckoner calculator for pump pressure drop with various viscous fluids by Plenty & Son Limited

Made:
1960-1965 in Newbury
maker:
Plenty & Son Limited

Circular ready reckoner calculator for pump pressure drop with various viscous fluids by Plenty & Son Limited, Newbury with cardboard sleeve and instructions.

Details

Category:
Mathematics
Object Number:
1998-470
Materials:
plastic, cardboard, paper and complete
Measurements:
overall: 5 x 170 x 170 mm
type:
ready reckoner (engineering)
credit:
Mr J.C. Michie