NIST’S DAVID WARD AND METROLOGY STAND AT TOP OF WASHINHGTON MONUMENT

CLOSE UP OF METROLOGY STAND ON TOP OF WASHINGTON MONUMENT

NIST’S DAVID WARD WITH FINGER ATOP THE WASHINGTON MONUMENT

SCIENTISTS AND ENGINEERS FROM THE NATIONAL BUREAU OF STANDARDS (NOW NIST) AND THE ALUMINUM COMPANY OF AMERICA (NOW ALCOA) INSPECTING THE TOP OF THE WASHINGTON MONUMENT IN 1934