Smithsonian, four letters

Smithsonian, four letters dated October 25, 1967, 26 January 1979, 25 February 1980, 24 March 1980, 27 March 1980 from the Smithsonian Institution to Prof. William J. Eney, 62 Wall St., Bethlehem, PA 18018 dealing with the donation of the “Eney Deformeter” and other engineering artifacts such as the Quebec Bridge member and a Bollman truss tested in Fritz Laboratory. The writer of the letters is Robert M. Vogel, Curator, Division of Mechanical and Civil Engineering, Smithsonian Institution.