Girton College, Cambridge Isabel Ellie Knaggs (2 August 1893 – 29 November 1980) was a Colony of Natal born crystallographer.
[1] In 1913 Knaggs joined Girton College at the University of Cambridge to study chemistry.
[3][4] She completed her PhD, The Relation between the Crystal Structure and Constitution of Carbon Compounds, with Special Reference to Simple Substitution Products of Methane, in 1923 at Imperial College London.
[5][6] During her PhD Knaggs remained as a demonstrator in geology at Bedford College, London.
[3][9][10] Knaggs co-authored Tables of Cubic Crystal Structures with Berta Karlik and Constance Elam in 1932.