Ballinger architect Edward Robinson, AIA, LEED AP has been conducting research into Ballinger’s long history. Ballinger was one of the first firms in the country to merge the disciplines of architecture and engineering. Yesterday Ed presented a talk “Ballinger in the First Machine Age,” covering the years 1878-1990. Drawing on a variety of primary sources collected over several years, Ed described the evolution of the firm in the context of Philadelphia’s rapid growth.