![](https://laboratoryplasticwarepolylab.com/wp-content/uploads/2017/03/47-3.jpg)
To show the maximum density of water. Sheet iron cylinder 203 x 50 mm height x diameter, mounted on a base and encircled midway along its length by a gallery 63 x 100 mm, height x diameter. Fitted with tubulures to carry thermometers and rubber stoppers.