19thcentury 2009j-566 507 catalogs designandconstruction equipmentandsupplies equipmentdesign etc handbooks history laboratories manuals nationalmuseumsofscotland opticalindustry opticalinstruments opticalinstrumentsindustry q185m821b1989 q185m821ba2009 scientificapparatusandinstruments scientificapparatusandinstrumentsindustry scotland scotlandscientificinstrumentindustries trades