v. 1. Section A'shuman necessities .-- v. 2. Section B, Performing operations, transporting .-- v. 3. Section C, Chemistry, metallurgy .-- v. 4. Section D, textiles, paper .-- v. 5. section E, fixed constructions .-- v. 6. Section F, mechanical engineering, lighting, heating, weapons, blasting .-- V. 7. Section G, Physics .-- v. 8. Section H, electricity .-- v. 9. Guide, Survey of classes, and summary of main groups