22. Estimated number of men engaged in building trades,
1915 174

23. Union regulations as to entering age of apprentice 175

24. Union regulations as to length of apprenticeship
period 175

25. Union scale of wages in cents per hour, May 1, 1915 177

26. Usual weekly wages of apprentices in three building
trades 178

27. Average daily earnings of job and newspaper composing
room workers, 1915 199

28. Average daily earnings of pressroom workers, 1915 202

29. Average daily earnings of bindery workers, 1915 203

30. Average daily earnings in photoengraving, stereotyping,
electrotyping, and lithographing occupations, 1915 205




LIST OF DIAGRAMS