Classic Glass Mercury Thermometer - Medical & Laboratory Use #1852123 (License: Personal Use)

This image depicts a vintage-style glass mercury thermometer, featuring a sealed glass tube with a bulb reservoir at one end and a narrow capillary channel containing mercury that expands with heat. The scale is marked in Celsius or Fahrenheit increments, allowing precise temperature readings. Though largely phased out due to safety concerns, such thermometers were once standard in clinical and scientific settings.

Used on educational, medical history, or instrumentation web pages; supports content about historical diagnostic tools, thermometry principles, or comparisons with digital alternatives. Matches user intent seeking visual reference or technical explanation of analog thermometers.