In 1906, at 1:30 pm, Marie Curie gave her inaugural lecture as the first woman lecturer at the Sorbonne. She explained the theory of ions in gases and her treatise on radioactivity to120 students, public and press. It wasn this same day, fifteen years earlier, 5 Nov 1891 that she first enrolled at the Sorbonne. Following the accidental death of her husband, Pierre Curie, she had been invited to occupy the Physics chair at the Sorbonne that he had held. Madame Curie, by now a Nobel prize winner and authority on radioactivity, continued the work she started with her husband. Madame Curie: A Biography, by Eve Curie. - book suggestion.