DUTY n.
The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).
ELASTIC a.
ose which have the property of expanding in all directions on the removal of external pressure, as the air, steam, and other gases and vapors. -- Elastic limit (Mech.), the limit of distortion, by bending, stretching, etc., that a body can undergo and yet return to its original form when relieved from stress; also, th…