Diatom arrangements by Johann Diedrich Möller (1844 - 1907).
A Selection of Diatom Slides Kept at the
Meise Botanic Garden, Belgium.

by Jef Schoors, Belgium

Credits and acknowledgements: Slide access from the Meise Botanic Garden, Belgium and loaned for photomicrography by Jef Schoors. Images shared with the Botanic Garden's kind permission.

Micscape introduction: Readers familiar with the breathtaking diatom arrangements of Johann Diedrich Möller (1844 - 1907) may be aware that his most famous arrangement was his "Universum Diatomacearum Möllerianum" of 4026 diatom species. Very few people have had the privilege of exploring this irreplaceable slide under the microscope first hand. In March 2015 Micscape were delighted to hear from a Belgian microscopy enthusiast Jef Schoors who was able to study and photograph the slide using the museum's microscopy facilities and shared an article on this slide and on aspects of Möller's work. A virtual tour to species level of this slide using Jef's splendid stitched images was also provided.

Jef has recently been allowed access to further slides by Möller and he shares an image gallery below.

Jef Schoors writes:

This may be of interest to the visitors of your site: I hereby send you some recent photos that I took of special J.D. Möller slides which are kept safely in the 'Plantentuin Meise' (Meise Botanic Garden, Belgium). Some of them are also on display in the exhibition 'Diatoms, art in a box of nature'.

The 'Möller Universum Diatomacearum' was shot in 2015 in the Meise Botanic Garden because this precious slide is stored in a safe and may not leave the laboratory. This also counts for the extensive diatom material and slides from the Van Heurck collection (with lots of Möller slides).

For the exhibition however I was exceptionally allowed to photograph some diatom mounts with my own equipment at home. Since I always aim for the highest quality I rely on different scopes. The brightfield and darkfield photos are done with my Zeiss Standard and planapo's. For the DIC photos I use a Leitz Aristoplan, equipped with plan Fluotars. The phase contrast photo is done with an old Olympus Vanox and plan phase optics.

I get the best results with the appropriate photo-oculars: Zeiss KPL W 8x/20 (10x would be better because the 8x gives a little vignetting), Leitz Periplan 10x (the one with glasses symbol and the red dot), and Olympus FK 2,5x.

All shots were taken with a Nikon D800 [DSLR] in RAW and cleaned up in Photoshop. I used stitching (2 to 4 images) and to some degree also stacking. For the connection of the Nikon to the microscopes I replaced the original connection rings with Nikon conversion rings (M42 - Nikon) plus some 'DIY adapters' and verified parfocality with the oculars.

The old optics do not have the same clarity as modern equivalents, but the sharpness is there, and the 'haze' is easily filtered out with the RAW convertor of Photoshop.

Images - brightfield unless otherwise stated.

 Inverted in Photoshop




DIC with lambda plate


Comments to the author Jef Schoors are welcomed.
The images above of the slides at the Meise Botanic Garden are by Jef Schoors. For further image use please contact the author in the first instance.


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