Historical Mercury Thermometer Diagram - Scientific Instrument Illustration #287462 (License: Personal Use)

This black-and-white line drawing depicts a traditional U-shaped mercury thermometer with a calibrated vertical scale ranging from 0 to 100 units (likely Celsius), a large spherical bulb at the base, and a secondary reservoir chamber. The instrument uses capillary action and thermal expansion of mercury to indicate temperature, reflecting pre-digital measurement methods. Its ornate base and precise gradations highlight craftsmanship typical of 19th-century scientific instruments.

Used in educational articles, museum exhibits, or historical science blogs to illustrate early thermometry; targets users researching antique instruments, physics history, or STEM pedagogy.