Abstract: A desired amount of liquid ("unit dose") to be dispensed from a stationary dispenser is automatically, accurately controlled by suddenly interrupting the flow of liquid being dispensed after a major portion of the unit dose has been dispensed. A portion of the lost momentum is restored and discharge of the unit dose is completed. Pressurized inert gas is used to speed up dispensing the unit dose to meet a fill-and-discharge cycle time of <2 min, preferably <1 min. The unit dose is dispensed with better than .+-.5% accuracy, preferably at least .+-.3%, without measuring either the level or the volume of the liquid in the dispenser, or directly measuring the weight of liquid dispensed. More than the desired amount of liquid to be dispensed is held in the dispenser which is charged under pressure in the range from 380-790 kPa (40 to 100 psig), at too high a velocity to establish a stable level.