HAMS of David Dunlap reflecting telescope, north pier on right foreground, counterweight on left, cage in background. Shot of Dr Donald Macrea watching as dome shutters open. Interior shot of telescope cage, six-foot plus mirror with protective covers on in background, Cassegrain mirror mountings in upper foreground. Shot of Dr Macrea climbing into cage, opening mirror covers. LAMS of telescope seen from position near south pier of polar axis. Shot of Dr Macrea walking into frame, looking up at telescope and proceeding to adjust telescope onto co-ordinates of star to be photographed. Interior shot of cage showing cassegrain mirror as cage is being raised into position. MS of Dr Macrea closing primary mirror covers. MS of ornamental astrolabe in library, PAN to librarian and man, to books on shelves in background. Shot of two young men putting refracting telescope together in shop. CUs of second hand of chronometer, of escapement mechanism of clock. HAS of Dr Macrea underneath telescope, going to his desk, telescope's counterweight in upper foreground, south pier in lower left. MS of telescope, of astrolabe. CU of stills of great Andromeda nebula. Shot through open shutter of dome.