The following account gives a description and record of tests made by the writer in the early part of i8S6 on the new compound pumping engine then recently erected by the Blake Steam-Pump Company at the Kings County Oil Works, Greenpoint, L. I. These tests were made with the view of ascertaining the economy to be gained by the use of compound instead of simple engines for direct-acting pumps. Description of the Pumping Engines.
The pump draws the water from Newtown Creek, through a suction pipe 16 inches in diameter and 222 feet 4 inches long, and delivers it into a large mam 14 inches in diameter, whence it is distributed, through branch pipes varying in diameter from 8 to 12 inches, to the cooling coils of the oil refinery and for other purposes. The aggregate length of the main and branch discharge pipes is 1572 feet. The height to which the water has to be raised on the suction side varies with the tides ; the water is delivered ordinarily against a head of about 35 feet.