An exhibition catalogue of a dozen C16th and C17th astrolabes.  Many recovered from shipwrecks or during dredging operations and each illustrated by large b&w plates with accompanying descriptions.  Paperback.  36 pages.  Very good condition.  This copy also includes, as a loose insert, 'On the Origin of the Mariner's Astrolabe' by Francis Maddison, an eight-page Occasional Paper published by the Museum of the History of Science, Oxford.  Cat No 3280