Excerpt from Duty and Capacity Tests of Worthington High Duty Pumping Engines on Water Works and Pipe Line Services
The history of the Worthington Pumping Engine dating from its invention in 1840 to its present state of development. has been Это и многое другое вы найдете в книге Duty and Capacity Tests of Worthington High Duty Pumping Engines on Water Works and Pipe Line Services (Classic Reprint)