Effect of glass containers on the electromotive force of Weston normal cells

Improvements in the reproducibility and constancy of electromotive force (emf) of Weston normal cells have resulted from many previous researches, but little attention has hitherto been given to effects which may be produced by the glass containers. Accelerated experiments have now been made by adding samples of glass in powdered form to the mercurous-sulphate paste and the resulting effects have been found to parallel the behavior of other cells which have been under observation for longer periods of time. Various chemical compounds have also been added to the paste to test their effects on emf of the cells. Some of these materials have caused abnormal hysteresis and temperature coefficients. The glass containers have been redesigned with a view to improving the constancy and portability of the cells. CONTENTS Page