Historical U-Shaped Glass Laboratory Apparatus with Stopcocks #3807766 (License: Personal Use)

This black-and-white line drawing depicts a U-shaped glass tube mounted on a rectangular base, featuring two calibrated stopcocks (tap valves) near the lower ends of each vertical limb. The design suggests use in quantitative chemistry, such as measuring gas volumes via water displacement or performing controlled liquid transfers. Its construction reflects pre-20th-century laboratory instrumentation standards, emphasizing durability and manual operation.

Commonly found in historical science textbooks, museum exhibits, or educational resources about the evolution of lab equipment; users searching for “vintage chemistry apparatus,” “historical lab glassware,” or “U-tube experiment setup” would find this image relevant.