Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
You can use this work for any purpose, as long as it is not primarily intended for or directed to commercial advantage or monetary compensation. You should also provide attribution to the original work, source and licence. Read more about this licence.
A woman dropping her porcelain tea-cup in horror upon discovering the monstrous contents of a magnified drop of Thames water; revealing the impurity of London drinking water. Coloured etching by W. Heath, 1828. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.