As reduced to the actual delivery of water, in the reservoir, it was 76,386,262 and 76,584,894 by the two methods respectively.
The following is the duty officially given for the engines cited: —
Brooklyn, No. 1, double-acting beam60,140,700
Belleville (Jersey City), Cornish62,823,300
Hartford (3 experiments), crank58,779,300 to 64,669,400
Brooklyn, No. 3, double-acting beam72,000,000
Cambridge (2 experiments), Worthington double-cylinder, not duplex66,941,100 to 67,574,600
Spring Garden (Philadelphia), Cornish58,905,300
The dity or useful effect of the Cornish pumpingengine has been more closely observed and recorded than that of any other engine.
The duty is reported monthly, and is reduced to tabulated form, from which the yearly report is made out.
The duty of these engines has been gradually improved.
It is estimated by the number of pounds raised one foot high by a bushel of Welsh coals, 94 pounds.
Pounds, 1 foot high.
In 1769, the Newcomen engine5,500