Clinical Glass Thermometer Illustration - Medical Measurement Tool #1398947 (License: Personal Use)

This black-and-white line drawing depicts a traditional mercury-in-glass clinical thermometer, angled diagonally across the frame. The illustration clearly shows the bulb reservoir, narrow capillary tube, and numbered scale markings for Celsius or Fahrenheit readings. Designed for oral, axillary, or rectal use, such thermometers were standard in medical practice before digital alternatives became widespread.

Used on health education pages, medical history articles, or vintage medical equipment galleries; matches user intent for understanding historical diagnostic tools or comparing analog vs. digital thermometry.