Coil 240 Turns

A contact arm & three metal studs mounted on a bakelite base with three brass terminals. The centre terminal is common connection to the arm & the other two terminals connected to the other studs.

Used for measurement of small quantities of electrical charge.

Levelling Screws for balancing the coil. Coil with mirror suspended between long suspension at the upper end and a spring at lower end. Suspension and spring are made of phosphor bronze alloy. Bakelite case, rigid and robust. Clamping arrangement for transportation. Consistent sensitivity over a large period. Strip provided for making it a periodic