title: Abnormalities in passive movement: diagrammatic representation.
abstract: "Geography would be incomprehensible without maps. They've reduced a tremendous muddle of facts into something you can read at a glance. Now I suspect [passive movement] is fundamentally no more difficult than geography. Except that it's about things in motion. If only somebody would invent a dynamic map." C. P. Snow(2.)
authors.forename: J
authors.initials: J
authors.lastname: Hickling
authors.forename: G D
authors.initials: GD
authors.lastname: Maitland