In imparting instruction in Artillery drills, it should be borne in mind, that in every change of numbers men have to learn different duties and to handle different implements from those they were previously engaged with; the duties again vary with...
United States Works Progress Administration (New York, N.Y.)
Tables of grid coordinates ... computed ... by the Project for the computation of mathematical tables ... The basic formulas upon which the tables have been developed are from Special publication no. 59, U.S. Coast & Geodetic Survey.--Pref.