MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Weighing chemicals. Beaker of an aqueous (dissolved in water) solution of copper (II) sulphate (CuSO4, blue) being weighed on a digital mass balance. This balance is accurate to two decimal places. The controls include a switch for setting the reading to zero, and a bubble level window (lower right) to ensure the balance is set on a level surface.
Model release not required. Property release not required.