Question

explain the setup of six's maximum and minimum thermometer

Answer 1

A combination maximum-minimum thermometer. It has a U-shaped glass tube whose bottom half is filled with mercury. The left-hand horn is filled with alcohol, and the right-hand horn is partially filled with alcohol; the remaining portion has a gas above it. A colored glass index contains a thin iron pin in the center on both sides of the tube on top of the mercury. When the temperature increases, the alcohol in the left side expands and forces the mercury and the alcohol column on the right side into the gas chamber. The index in the right-hand tube also rises. When the temperature decreases, the alcohol in the left side contracts and the gas expands, forcing the liquid back into the left side and pushing the index along with it. The indices retain their position, which they achieve when the maximum and minimum temperatures are reached. They are reset with an external magnet.

Hope you understand.