The experiments with this form were not successful, and, with the view of making the moving parts as light as possible, he substituted for the comparatively heavy lever armature a small piece of clock spring, about the size of a sixpence, glued to the centre of the diaphragm.
sixpence הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד