May belong to Hufford's wife Bessie Lynn. 9 Notebook 2. Handwritten notes on scientific articles. 11 Notes on problems in light. Handwritten calculations on the verso side of mimeographed test questions.
Articles read and abstracted on positive rays, reprints, notes and letters.
14 Report on research work under the Waterman Institute for the academic year 1927-1928. 15 Research notebook. 16-17 Research Notebook 2. The ionization of hydrogen by impacts of positive ions. Some new diffraction photographs.