It is a famous instrument for determining the Young’s modulus of a wire and is indispensable where most accurate measurements are desired. The instrument consists of two iron frames connected by a link. The frames are fitted with self centering chucks.An accurately graduated micrometer screw to read 0.01mm is fitted on a frame. One end of a sensitive spirit level is pivoted to one of the frame, the other end on the points of a micrometer screw is fitted in other frame. Complete with iron C.P. Chucks, cast iron ceiling attachment and torsion weight but w/o velvet case.