J. E. Metcalf

E. C. Wagner

E. C. Wagner worked for the United States Engineer District Office.

G. M. Fleetwood

G. M. Fleetwood worked for the Fercleve Corporation.

George K. Derby

Percival “Dobie” Keith

Percival C. “Dobie” Keith was Vice President for Research and Engineering for the M.W. Kellogg Company.