The series consists of A. Stanley Mackenzie’s unpublished material including his research notes, pertaining to Cavendish Experiment, Academy of Music in Halifax, etc.; course-related materials and lecture notes taken when he was studying at Dalhousie University (1881-1885) and Johns Hopkins University (1889-1891), compiled when he taught at Bryn Mawr College (1891-1905) and Dalhousie University (1905-1923); examination papers; book reviews and comments written by and about Mackenzie’s papers; research notes pertaining to chemistry, experiments on magnetism, dynamics and crystals, research material for his Ph. D thesis; and lab books on topics in practical physics, physical laboratory, minor chemistry.