The physics department at the Sorbonne refuses to fund their research without more proof of the element's existence, but allows them to use a dilapidated old shed across the courtyard from the physics building. In spite of its disadvantages, they import eight tons of pitchblende ore and cook it down to look for the element they call radium. In spite of inability to separate out pure radium, they know something is definitely there, as Marie's hands are being burned. They hit on a tedious method of crystallization to arrive at pure radium.