CHAPTER IV

TESTING AND MATURING SELENIUM CELLS 32 Two States. Testing and Maturing Set. Accessories for Set. Construction of Rheostat Arm for Wheatstone Bridge. Measurement of Cells by Bridge Method. Tests for Light Sensitiveness. Proper Voltage. Classification of Cells. Testing for Polarization. Treating with A. C. Raising Resistance of Cells. Testing for Current Generation. Reconstruction of Useless Cells. Measurement of Cells by Substitution Method. Sealing Cells.