"There was cause for celebration last March 6 at the Department of Commerce building in Washington, D.C. The achievement was the recording of 250 million on the bureau's "population odometer," a device which records the population of this nation at any moment.
Based upon average births, deaths, immigration and emigration, a number is added every 14 seconds to the odometer, for a daily increase of about 6300. It was expected that the population total of 250 million would be confirmed with the results of the April 1 census. But preliminary figures indicate that the country has not yet reached this landmark one-quarter billion population figure. The census people must have been disappointed--certainly many states, cities and rural areas have been as a result of their figures just released by the bureau."
Smolski, Chester, "Charting Migration and Miscalculation" (1990). Smolski Texts. 323.