Type of Thermometer: These are classic liquid-in-glass thermometers, most likely containing mercury or a mercury-free alternative like Galinstan (a mixture of gallium, indium, and tin), which replaced mercury due to its toxicity. Given their age and style, they are often referred to as mercury thermometers or glass clinical thermometers.Purpose: The scale ranges (e.g., from $35^\circ\text{C}$ to $42^\circ\text{C}$ or similar) indicate they are clinical thermometers used for measuring human body temperature.Scale: The thermometers are calibrated in the Celsius ($^\circ\text{C}$) scale.Case: The topmost item is a metal case (likely aluminum or chrome-plated brass) designed to safely store and protect a single glass thermometer, which was common practice for personal medical instruments. The other thermometers are shown out of their cases, with the bottom one partially encased in what appears to be a protective sleeve or part of a case.In summary, the image shows a set of vintage mercury-in-glass clinical thermometers, often collected as medical antiques or historical artifacts, alongside a typical protective metal carrying case.Would you like to know more about the history of the clinical thermometer or the reasons why mercury thermometers are no longer recommended?
The image displays a collection of vintage or traditional clinical thermometers with a metal case.
