Utilisation Research Association (BCURA) in 1942. The BCURA was located on the Coombe Springs Estate near Kingston upon Thames near the southwestern boundary of London. Norrish acted as advisor to the military at BCURA. John G. Bennett was the director. Marcello Pirani and Victor Goldschmidt, both refugees from the Nazis, were consultants and lectured at BCURA while Franklin worked there. During her BCURA research, she stayed at Adrienne Weill's boarding house in Cambridge until her cousin Irene Franklin asked to join her in a vacated house of her uncle in Putney. With Irene, she volunteered as an Air Raid Warden and regularly made patrols to see the welfare of people during air raids. She studied the porosity of coal using helium to determine its density. Through this, she discovered the relationship between the fine constrictions in the pores of coals and the permeability of the porous space. By concluding that substances were expelled in order of molecular size as temperature increased, she helped classify coals and accurately predict their performance for fuel purposes and for production of wartime devices such as gas masks. This work was the basis of her Ph.D. thesis The physical chemistry of solid organic colloids with special reference to coal for which the University of Cambridge awarded her a Ph.D. in 1945. It was also the basis of several papers. Career and research Franklin spent her career working in London and Paris. Paris With World War II ending in 1945, Franklin asked Adrienne Weill for help and to let her know of job openings for "a physical chemist who knows very little physical chemistry, but quite a lot about the holes in coal". At a conference in the autumn of 1946, Weill introduced her to Marcel Mathieu, a director of the Centre national de la recherche scientifique (CNRS), the network of institutes that comprise the major part of the scientific research laboratories supported by the French government. This led to her appointment with Jacques Mering at the Laboratoire Central des Services Chimiques de l'État in Paris. She joined the labo (as referred to by the staff) of Mering on 14 February 1947 as one of the fifteen chercheurs (researchers). Mering was an X-ray crystallographer who applied X-ray diffraction to the study of rayon and other amorphous substances, in contrast to the thousands of regular crystals that had been studied by this method for many years. He taught her the practical aspects of applying X-ray crystallography to amorphous substances. This presented new challenges in the conduct of experiments and the interpretation of results. Franklin applied them to further problems related to coal and to other carbonaceous materials, in particular the changes to the arrangement of atoms when these are converted to graphite. She published several further papers on this work which has become part of the mainstream of the physics and chemistry of coal and carbon. She coined the terms graphitising and non-graphitising carbon. The coal work was covered in a 1993 monograph, and in the regularly-published textbook Chemistry and Physics of Carbon. Mering continued the study of carbon in various forms, using X-ray diffraction and other methods. King's College London In 1950, Franklin was granted a three-year Turner & Newall Fellowship to work at King's College London. In January 1951, she started working as a research associate in the Medical Research Council's (MRC) Biophysics Unit, directed by John Randall. She was originally appointed to work on X-ray diffraction of proteins and lipids in solution, but Randall redirected her work to DNA fibres because of new developments in the field, and she was to be the only