FOREWORD 
§ ‘OR a variety of reasons many industries find it neces- 
K sary or advisable to operate their plants both day and 
night, either as a fixed practice or temporarily, because 
of special circumstances. Practically no information is avail- 
able showing the types of night work organization or experi- 
ence in obtaining labor, relative costs and efficiency or other 
questions involved in the advantage or disadvantage of night 
operation. For this reason the Conference Board conducted 
an investigation with regard to night work in industry, and 
the results are presented in this monograph. 
This report is the result of an investigation conducted by 
Mr. Jules Friedel and assistants of the Conference Board’s 
Research Staff, under the supervision of the Board's Staff 
Economic Council. 
In the preparation of its studies, the National Industrial 
Conference Board avails itself of the experience and judg- 
ment of the business executives who compose its membership, 
and of recognized authorities in special fields, in addition to 
the scientific knowledge and equipment of its Research Staff. 
The publications of the Board thus finally represent the result 
of scientific investigation and broad business experience, and 
the conclusions expressed therein are those of the Conference 
Board as a body. 
In this study the Conference Board has had the benefit of 
the cooperation and practical experience of its Advisory 
Committee on Industrial Relations, composed of: 
Arthur H. Young, Industrial Relations Counsel, Industrial 
Relations Counselors, Inc., New York, N. Y., Chairman. 
C. S. Ching, Supervisor of Industrial Relations, U. S. Rub- 
ber Company, New York, N. Y. 
A. S. Donaldson, Assistant General Manager, R. H. Macy 
and Company, New York, N. Y. 
William B. Foster, Director of Service Department, E. I. 
duPont de Nemours Company, Wilmington, Del.