Meanwhile, Hens catalogued the microscopes and other equipment (we have the most amazing range of pH meters, for example) in our collection. She then went on to research and catalogue our collections of original and printed botanic and microbiological wall charts (see blogposts “The art of Henriette Beijerinck” and “Educational Wall Charts – where are they now?”). First she restored our enormous collection of glass negatives (see the blogpost “Glass negatives galore!”) after they all got damp during asbestos removal in the attic where they were stored.
#Ernst leitz wetzlar microscope review archive
The Delft School of Microbiology Archive owes a huge debt to both of them. This microscope was given to the collection by Dr and Mrs ten Hoopen, both of whom worked in the Department of Applied Botany before volunteering to help with the Archive and Museum after they retired. The sample lies on the stage and can be illuminated from above, with the observer’s light path underneath the stage. Inteference microscope by Cooke, Troughton & SimmsĪttachments for the Cooke et al microscopeĪnd lastly, one of the most unusual microscopes in our collection, a reversed microscope made by Nachet & Fils of Paris. They may appear as we complete the packing of the collection, but it’s beginning to look unlikely. Note added later: Disappointingly, after a visit in mid-June from Peter Paul de Bruyn, an expert on Bleeker microscopes, it seems that the microscopes whose boxes proclaimed them to be phase contrast microscopes do not have the necessary lenses or fittings. Most of them, with the exception of the binocular phase contrast microscope, seem to have been use in in the laboratory before 1955. We also have one of their very early binocular microscopes as well as monocular and binocular phase contrast microscopes. Most of them have the standard circular stage, but a few are square. Kluyver’s group seems to have used the basic Nedoptifa microscope for teaching – we have quite a few of them. Bleeker retired at the end of 1963, the company was eventually taken over by a Delft firm and then in 1978 the factory in Zeist was closed. The company cooperated with the Nobel prize-winner, Frits Zernike, in the development of phase contrast microscopy and held his patent on phase contrast microscopes. Most of their microscope production seems to have been after 1945, when the “Nedoptifa” name came into use. They began with the production of binoculars for the Dutch army, but production was interrupted by WW2. (Lili) Bleeker and Gerard Willemse in 1939, Nedoptifa rapidly became known for the high standard of their optical products. The youngest of the companies represented in our microscope collection is probably the least well-known, especially outside the Netherlands.įounded by Dr Caroline E. Some of the microscopes date from the late 19 th century, and even some of the 20 th century ones are more interesting than might be expected. Much of it was stored in the 1950s when the Laboratory of Microbiology moved from its original building, and has rarely been disturbed since then. Antoni van Leeuwenhoek in Spain - 3,543 viewsĪt the moment, sorting out the cupboards before our move has become very exciting as I’ve reached the microscope collection.Something Van Leeuwenhoek didn’t see! - 3,688 views.Beijerinck’s office (and the neighbours)… - 3,899 views.Delft, the Home of Microbiology - 6,564 views.Auld lang syne, new beginnings and a mystery solved - 6,800 views.What was this microscope used for? - 7,492 views.Professor Beijerinck’s samples have left the building… - 7,733 views.From “out of date junk” to “exciting and rare” – our microscope collection - 8,803 views.
Delft’s Biological Labs 2: The originals.The path to a ground-breaking paper - 10,619 views.
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