For determining maximum density of water, made of G. I. Sheet
cylinder 50 mm dia x 300 mm height mounted on a base having
2 tubulatures for thermometers, with a gallery of 60 mm x
150 mm for placing mixture of ice and salt. The respective
temperatures of water at the top and bottom of the inner cylindrical
vessel are measured over a period as the water cools. Complete
with bungs and thermometers.