P. Humphreys

Percival “Dobie” Keith

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

C. O’Malley

LaVerna C. McKenzie

LaVerna C. McKenzie was a laboratory technician in the Health Division at the University of Chicago Met Lab.

H. R. Olson

H. R. Olson worked for the J.A. Jones Construction Company.