This Braun Electroscope rugged, sensitive electroscope can accept various accessories to change its capacitance. Sensitive aluminium vane is balanced in a vertical position on a metal support which is insulated from its base. The vane is easily observed and projected on a chalk board (light source not included). On which an arbitrary scale has been marked. Height without attachment is about 12’’ . Attachments can be charged using either power supply or electrophorus (not included).