McKenna Process Company
Plant formerly located in Joliet, Illinois - ca. 1920.
  Employees of the McKenna Process Company,
The two main employees of course were the George Langfords, Sr. and Jr.

George Langford, Jr. attemped to list the McKenna employees that he had known during his three Summers of work at McKenna in the years 1916 - 1918 (all spellings are approximations by George, III):
      Henry Eirich - roller
       ...       Olsen - heater
       ...       Ramsey - roll turner
      Bill Baylin - brickmason
      Jake Mork - millwright & rail sorter
      Bill Langford (cousin)
      Roy Sparling - finishing end
      Morris family ...
      Bob Spaulding - boss, hot mill & transfer table
      Ole Olson - heater, hot saw
      Louis Roberts - boss, unrolled rails
      Mike Nelson - boss, unrolled rails
      Fat Man Jollig -  boss, hot bed
      Louis Sulpho - cooling
      Zeke Watlow - bar mill set-up man
The roll stands were by Kruppenwerke, of Essen, Germany: 48 inch centers, herringbone gears