MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Reading the level of potassium permanganate in burette. When titrating potassium permanganate, a very dark liquid, the burette reading is taken from the top of the meniscus (the curved surface of a liquid in a vessel).
Model release not required. Property release not required.