Ivens & Co was one of the big Dutch producers and vendors of photographic equipment, lantern slides, and projection material between 1880's and at least WWII. This catalogue is in fact a catalogue of slides by York and Son that Ivens & Co had in stock. It
probably indicates that Ivens had an agency or similar arrangement for
Newton & Co. (by this date the owners of the York stock) and could
supply any of their slides to the Netherlands; Ivens would probably not
have carried a permanent stock of all of the slides. To learn more about the activity of Ivens & Co to see examples of lantern slides that are advertised in this catalog, visit the Lucerna Magic Lantern Web Resource at http://slides.uni-trier.de/organisation/index.php?id=1000833.Dating (between 1906 and 1913) is based on events described in lantern slide sets.