UNIVERSITY OF ILLINOIS BULLETIN 
Issuep WEEKLY 
August 28. 1628 
VoL. XXV 
"Entered as second-class matter December 11, 1912, at the post office at Urbana, Illinois, 
under the Act of August 24, 1912. Acceptance for mailing at the special rate of 
postage provided for in section 1103, Act of October 3, 1917, authorized July 31, 1918.7 
BUREAU OF BUSINESS RESEARCH 
COLLEGE OF COMMERCE AND BUSINESS 
ADMINISTRATION 
BULLETIN NO. 20 
(Distributed, Tuly, 1928) 
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