Al Litvin holding the all-clay construction block developed at Armour Research Foundation, Illinois Institute of Technology, Chicago, Illinois, ca. 1956 Armour Research Foundation (U.S.) Blocks (Building materials) Litvin, Al Building, Clay From the attached press release: "New, colorful, all-clay construction block developed at Armour Research Foundation of Illinois Institute of Technology, Chicago, weighs less than conventional concrete blocks. Al Litvin, supervisor of masonry materials, holds the ceramic block after removing it from molding machine." Photographer unknown. Date of photograph unknown. Date listed is approximate. 1956 Still image Black and white photograph image/tiff islandora:1001259 0360401-I3-10-004 http://hdl.handle.net/10560/islandora:1001259 Office of Communications and Marketing photographs, 1905-1999 Illinois Tech Libraries Illinois Institute of Technology en Chicago (Ill.) In Copyright http://rightsstatements.org/vocab/InC/1.0/