JESSIE M. SHEPHERD, A. B.
Associate Editor, Textbook Department, American School of Correspondence.
GEORGE C. RUSSELL
Systematizer.
Formerly Manager, System Department, Elliott-Fisher Company.
OSCAR E. PERRIGO, M. E.
Specialist in Industrial Organization.
Author of "Machine-Shop Economics and Systems," etc.
DARWIN S. HATCH, B. S.
Assistant Editor, Textbook Department, American School of Correspondence.