This apparatus is for the study of elasticity?, stress and strain.?The unit of modulus is found, this apparatus set consists of a lever?attached to the walls?of?the?two?beams,?one?side attached to a?wire, the other side is attached to the?micrometer.?The?other side of?the beam?has a?loop for hanging weights. Micrometer can be used to measure the vertical length of 10mm.