Research Consists of: -Royal Institution and early papers (files 1-83) -University College London (files 84-349) A chronological sequence of papers documenting various research work undertaken by Lonsdale during her years at University College London. Miscellaneous correspondence and papers are at C/318 to C/349. -Photographs (files 350-388) Photographs relating to X-ray diffraction work. Most are of diffraction patterns connected with various topics of research. They probably date to Lonsdale's early years at University college London; some may date from her time at the Royal Institution. 1923-1970