REF: http://sciencemuseumdiscovery.com/blogs/collections/delving-into-the-mysteries-of-our-slide-collections/
REF: https://www.mhs.ox.ac.uk/collections/search/displayrecord/?mode=displaymixed&module=ecatalogue&invnumber=41532&irn=12875&query=
REF: http://sciencemuseumdiscovery.com/blogs/collections/delving-into-the-mysteries-of-our-slide-collections/
REF: https://www.mhs.ox.ac.uk/collections/search/displayrecord/?mode=displaymixed&module=ecatalogue&invnumber=41532&irn=12875&query=