Glass Mercury Thermometer - Medical & Laboratory Temperature Measurement Tool #1852045 (License: Personal Use)

This illustration depicts a standard clinical glass mercury thermometer, angled diagonally, with a clear graduated scale marked in Celsius or Fahrenheit. The bulb at one end contains mercury that expands with heat, rising through the narrow capillary tube to indicate temperature. Though largely replaced by digital alternatives, it remains iconic in medical history and educational contexts.

Used in healthcare articles, medical history pages, science education resources, and vintage instrument collections; targets users researching historical diagnostic tools or comparing thermometry methods.