Bar And Gauge

For Demonstrating Expansion Of Solids By Heating And Contraction By Cooling. Comprising A Metal Bar Mounted On A Rod With Insulated Handle And A U-Shaped Metal Gauge Also Mounted On Insulated Handle, With Go/No Go Hole. The Space Between Both The Arms Precisely Adjusted To Just Admit The Bar Length Wise And The Bar Cross-Section Will Just Pass Through The Hole, When Cold Or When Both Heated To The Same Extent. On Heating The Bar, Neither Its Length Nor Cross Section Will Be Admitted In The Gauge At Respective Points. (Bar Size 90 x 10Mm (Length x Diameter) )