A commercial publication devoted solely to centrifugal pumps is being distributed by the De Laval Steam Turbine Co., of Trenton, N. J. This book of 298 pages contains over 300 illustrations, including centrifugal pumps for all capacities and heads, and for motor and steam turbine drives, diagrams showing the “characteristics” of such pumps and explaining the relations between impeller blade angles and characteristics, interior views and views of parts showing the construction, views showing the method of manufacture by the use of limit gages and methods of testing, installations of pumps for various services, also numerous illustrations of the De Laval reducing gear employed to allow electric motors, water turbines, steam engines and steam turbines to operate at economical speed when driving a centrifugal pump. Tables and charts are given for determining the resistance of pipes and the relation between heads and spouting velocities. The investigation of the pumping problem, together with drawing up of specifications for centrifugal pumps, are also treated at some length. The chapters on “Pump Characteristics” will prove interesting to the pump user.

A commercial publication devoted solely to centrifugal pumps is being distributed by the De Laval Steam Turbine Co., of Trenton, N. J. This book of 298 pages contains over 300 illustrations, including centrifugal pumps for all capacities and heads, and for motor and steam turbine drives, diagrams showing the “characteristics” of such pumps and explaining the relations between impeller blade angles and characteristics, interior views and views of parts showing the construction, views showing the method of manufacture by the use of limit gages and methods of testing, installations of pumps for various services, also numerous illustrations of the De Laval reducing gear employed to allow electric motors, water turbines, steam engines and steam turbines to operate at economical speed when driving a centrifugal pump. Tables and charts are given for determining the resistance of pipes and the relation between heads and spouting velocities. The investigation of the pumping problem, together with drawing up of specifications for centrifugal pumps, are also treated at some length. The chapters on “Pump Characteristics” will prove interesting to the pump user.

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