CHAPTER VI

THE CARE OF SELENIUM CELLS 62

LIST OF ILLUSTRATIONS

FIG. PAGE 1. Bildwell Cell 7 2. Ruhmer Cell 10 3. Bell and Taintor Cell 12 4. Mercadier Cell 14 5. Gripenberg Cell 15 6. Fritts Cell 17 7. Hot Press with Cell in Place 21 8. Details of Hot Press (elevation) 22 8. Details of Hot Press (plan) 22 9. Platen for Cell; and Template for Applying Selenium 24 10. Fiber Pieces for Enclosing Cell 26 11. Mode of Assembling Cell 30 12. Testing and Maturing Set 33 13. Layout and Wiring Diagram of Testing Maturing Set 35 14. Connections for Buzzer and Induction Coil to Produce Alternating Current 36 15. Connections for Interior of Rheostat Box 38 16. Circuit for Wheatstone Bridge Measurement 40 17. Circuit for substitution Method of Measurement 47 18. Showing Cell ready for Assembly with Four Complete Cells in background 49