D 'Miniature Speed Diagrams. Bendigo Trains', results of eight Bendigo line speed tests (1906-08) shown with curve and gradient diagrams and Up and Down dynagraph tests showing actual speeds in relation to both the curves & gradients and to the line speed limit. Presented in a large (commercial) half-leather book (50 x 25 cm), with the dynagraph tests pasted into the front section of this book. Cover is tatty; contents in very good condition, one test is loose.