The Differential Analyser and some applications / Arthur Porter. [Thesis (Ph.D.) - Victoria University of Manchester, 1936. 2 binders; include (loose) an abstract of the thesis (6p); an offprint 'The Construction and Operation of a Model Differential Analyser' by D.R. Hartree and A. Porter from vol.79 of Mem. & Proc. of the Manchester Lit. & Phil. Soc. 1935 July; and, in an end-pocket to vol.1, 8 sheets of drawings. With miscellaneous papers]