Digital Digest – August

Compiled by Glenn Roadley, NatSCA Committee Member, Curator of Natural Science at The Potteries Museum & Art Gallery.

Welcome to the August edition of NatSCA Digital Digest.

A monthly blog series featuring the latest on where to go, what to see and do in the natural history sector including jobs, exhibitions, conferences and training opportunities. We are really keen to hear more about museum re-openings, exhibition launches, virtual conferences and webinars, and new and interesting online content. If you have any top tips and recommendations for our next Digest please drop an email to blog@natsca.org.

NatSCA Conference 2021: Environmental Breakdown and Natural Science Collections

In case you missed it, the NatSCA 2021 Conference: Environmental Breakdown and Natural Science Collections, which took place in May, is now freely available to view online, through our website or YouTube channel. This year’s conference focussed on how we can address global issues such as climate change and habitat loss with our collections, and featured some amazing talks and fascinating tours from across the sector. All talks, tours and Q&A sessions have captions available.

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A Supreme, Dream Team: The American Institute for Conservation (AIC) and Society for the Preservation of Natural History Museums (SPNHC) Conference 2021

Written by Bethany Palumbo, ACR, Founder and Owner of Palumbo Conservation Services

As a Natural History conservator, I was thrilled to learn that the 2021 SPNHC conference would be a joint conference with the AIC. These two large US organizations have very different priorities and committees, but many collaborative interests. I had waited a long time for this collaboration! The theme of the conference was ‘Transformation’ seeking ideas to not only transform museums, but discuss how museums can transform the world for the better. A fitting theme for a year of massive upheaval and dramatic change.

The conference was originally due to be held in Jacksonville Florida, but the on-going pandemic meant it was moved online at the last minute. Though disappointed to not see colleagues physically, holding the conference online did allow for truly international participation and I could catch up on talks as and when I was able!

The majority of sessions were collaborative with talks from both members of AIC and the SPNHC. They were spread over 6 weeks, allowing for many more sessions than could normally be accommodated in a 5-day conference. The sessions were varied, covering not only the conservation of objects but digitization and data management, using Natural History as an educational tool, collaborating with stakeholder communities and storage and display.

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Size Matters: Pesticides in Large Mounted Vertebrate Specimens

Written by Becky Desjardins (Senior Museum Preparator & Conservator), Georgia Kay & Kim König (MSc students Museums & Collections – Leiden University; Naturalis Interns), Naturalis Biodiversity Center.

Back in 2013, Naturalis conducted a research project about arsenic in the museums’ specimens. The goal was to determine if arsenic was spreading from the collection areas into staff and or public areas of the museum. We tested many specimens with an XRF but also tested the elevators, door handles, floors, shelves, keyboards, etc. From this testing we developed protocols about handling specimens and how we use the spaces in the collection. You can read all about that project over here.

What didn’t get tested were the large mounted vertebrates. Back in 2013 the Naturalis collections were spread over a number of warehouses around Leiden. Because these external buildings were considered depots only (meaning no offices/canteens in these spaces) there was less concern about arsenic contamination in non-collection areas. The large vertebrates were considered to be high risk specimens (so very toxic), and were handled as such, they never had their moment with the XRF.

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We Brought Our Electric Ray Specimens Into The Lab…What Happened Next Will Shock You!

Written by Claire Smith, Project Officer at the Cole Museum of Zoology.

If you’ve been following the Cole Museum of Zoology on Twitter, you’ll know that the museum is closed at the moment – not only because of the COVID-19 lockdown, but also because we’re preparing our collections for their move into a brand new Life Sciences building. While the new museum may not be ready to open until 2021, we have plenty of work to do behind the scenes in the meantime.

Along with a team of staff and volunteers, I work on the fluid-preserved collections at the Cole Museum. As well as the ongoing task of keeping all of the wet specimens in good condition, we’re also putting some into safe storage, and getting others ready to go out on display. As part of my fluid-preservation Twitter, I share weekly threads about the kinds of tasks that the team takes on.

When specimens come into the lab needing work, we identify them from an abridged version of the museum’s catalogue. This gives us basic information such as the specimen’s accession number, its species, and what kind of fluid it’s preserved in. The majority of the Cole Museum’s specimens are fairly new, by museum standards – they’re mostly around 60 to 100 years old. Many of them have been re-sealed, re-mounted or been housed in new jars during this time, but every now and then we come across one which appears untouched. Continue reading

Chill Out: A Cautionary Note On The Use Of Aqueous Treatments On Taxidermy

Written by Lu Allington-Jones, Senior Conservator at the Natural History Museum, London.

Whilst trying (not very successfully) to find a “cure” for fat burn (Figure 1), I made an unwelcome discovery: sometimes the shrinkage temperature of deteriorated skin is actually lower than room temperature. This means that the skin will irreversibly shrink as soon as any water-based treatments are applied.

Figure 1. Fat burn can cause skin to rip and specimens fall apart

Shrinkage temperature (Ts) is commonly used in leather conservation to determine the level of deterioration, and the effectiveness of treatments. Ts is the temperature at which 2 corian fibres immersed in water show simultaneous and continuous shrinkage activity. It shows the level of deterioration because it indicates destabilisation of collagen fibres. Ts of fresh skin is 65oC and in deteriorated leather this can be reduced to 30oC (Florian, 2006). Ts is measured by immersing samples of leather (or skin) in water and gradually increasing temperature until shrinkage activity is observed under a microscope (Larsen et al. 1996; Vest & Larsen, 1999). Continue reading