The Evidence Studies were originally planned as a means of gathering evidence bearing upon various legal issues which arose under the National Recovery Act.  These studies have value quite aside from the use for which they were originally intended. (from the introduction)

1. Automobile Manufacturing Industry
2. Boot and Shoe Manufacturing Industry
3. Bottled Soft Drink Industry
4. Builders’ Supplies Industry
5. Chemical Manufacturing Industry
6. Cigar Manufacturing Industry
7. Construction Industry
8. Cotton Garment Industry
9. Dress Manufacturing Industry
10. Electrical Contracting Industry
11. Electrical Manufacturing Industry
12. Fabricated Products Manufacturing and Metal Finishing and Metal Coating Industry
13. Fishery Industry
14. Furniture Manufacturing Industry
15. General Contractors Industry
16. Graphic Arts Industry
17. Gray Iron Foundry Industry
18. Hosiery Industry
19. Infant’s and Children’s Wear Industry
20. Iron and Steel Industry
21. Leather
22. Lumber and Timber Products Industry
23. Mason Contractors Industry
24. Men’s Clothing Industry
25. Motion Picture Industry
26. Motor Bus Manufacturing Industry (dropped)
27. Needlework Industry of Puerto Rico
28. Painting and Paperhanging and Decorating
29. Photo Engraving Industry
30. Plumbing Contracting Industry
31. Retail Food (BPL does not have)
32. Retail Lumber Industry
33. Retail Solid Fuel (dropped)
34. Retail Trade Industry
35. Rubber Manufacturing Industry
36. Rubber Tire Manufacturing Industry
37. Silk Textile Industry
38. Structural Clay Products Industry
39. Throwing Industry
40. Trucking Industry
41. Waste Materials Industry
42. Wholesale and Retail Food Industry
43. Wholesale Fresh Fruits and Vegetables
44. Wool Textile Industry
45. Automotive Parts and Equipment Industry
46. Baking Industry
47. Canning Industry
48. Coat and Suit Industry
49. Household Goods and Storage (dropped)
50. Motor Vehicle Retailing Trade Industry
51. Retail Tire and Battery Trade Industry (BPL does not have)
52. Ship and Boat Building and Repairing Industry
53. Wholesaling or Distributing Trade (BPL does not have)