Medical physics: what is it? 'Medical physics: what is it?' was written by Professor J.R. Mallard and published in the Aberdeen University Review, Vol. XLII, No. 137, Spring 1967. The article is a published version of the inaugural lecture given by Professor J.R. Mallard. This copy is an offprint from the journal. There is a handwritten dedication from Professor J.R. Mallard to his wife on the front of this offprint "With deepest love and thanks to my darling Fiona. John. xxxxxxx November 1967, Anderson Drive". 1967