GUNTHER EXPANSION APPARATUS

Comprising a double metal-plastic jacket enclosing rods which are to be raised to a temperature of 100C. a micrometer mounted on one end-piece of the support shows the increase in length of the sample rod to accuracy of 0.005mm. Complete with one brass, one aluminum and one iron rod, length 500mm approx.; mounted in the double jacket. Supplied with two plastic pipes 1500mm long each.