1. Primary Precious Metals.- 2. Chemistry.- 3. Testing, Identification, and Familiarization.- 4. Recovering and Refining Values from Secondary Sources.- 5. The Platinum Sisters.- 6. Electrochemical Principles.- 7. Electrorefining.- 8. Collectors and Separators.- 9. Wet Chemical Master Plan.- 10. Various Systems.- 11. Black Sands.- 12. Fire Assaying.- Appendix B: Natural Chemical Elements.- Appendix C: Some Metallic Salts and Their Contents.