Acknowledgment
This monograph was prepared by F. G. Nichols, Assistant Director for Commercial Education of the Federal Board for Vocational Education. Acknowledgment is made for material furnished by Mr. Wm. A. Barber, Mr. Albert G. Borden, Mr. L. B. Elliott, Mr. Leighton Forbes, Mr. J. E. Fuller, Mr. Frank L. Jones, Dr. Roy S. MacElwee, Special Agent of the Federal Board for Vocational Education, and Mr. Edward A. Woods. Acknowledgment is due to Dr. John Cummings, of the Research Division, for editorial assistance.