International Hall Test Correspondence

December 14, 1912 - May 26, 1915, International Hall, These correspondences are between Willis Slater, Frank A. Randall, the chief engineer of Morey, Newgard & Co, J. Norman Jensen, an architectural engineer for the City of Chicago Department of Buildings, Professor William H. Kavanaugh of the University of Minnesota, Charles A. Phelps, Attorney at Law, and C.A.P. Turner, the owner of Turner Manufacturing Plants and the creator of the "Mushroom System", C.L. Rodgers, Chief Engineer of Union Stock Yards and Transit Co., C.M. Leonard, the owner of Leonard Construction Co. and competitor of Turner's, Andrew Hummeland, Attorney at Law, A.R. Lord of the Leonard Construction Company. The topics of this set is the testing of the Turner Mushroom System of Reinforced Concrete at the International Hall, the U.S. Yards and Transit Co. building and the issues resulting from this including billing and salaries, poor test results on buildings, and the lawsuit against Turner.