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

NatSCA Digital Digest – January

Compiled by Lily Nadine Wilkes. NatSCA Volunteer.

Welcome to the January 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.

News from the Sector 

Decolonising Natural Science Collections

Our blog has some fascinating videos from the Decolonising Natural Collections online conference. Each post includes a recording of the talk alongside the abstract and information about the author(s). Learn about how a taxidermied gorilla can tell us so much more in this presentation by Rebecca Machin. What words we use to represent Australian animals are challenged in this presentation by Jack Ashby. Decolonising the Powell-Cotton Museum is the topic of this presentation by Rachel Jennings.

All of the conference talks will eventually be published by the end of this week, so do keep an eye on our blog page for each of these posts: https://natsca.blog, and remember, you can also access all the talks directly by going to our

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#NatSCAConservation Twitter Conference

Written by Lucie Mascord, NatSCA committee conservation representative.

During the week of the 18th January 2021 NatSCA will be hosting their first ever Twitter conference all on the subject of conservation.

Following on from the success of our inaugural conservation conference “Caring for Natural Science Collections” held at Oxford University Museum of Natural History back in October 2018, the NatSCA conservation working group had hopes of another conference this year. However, it was not to be, so we are changing the format and coming to you in 2021!

The attendees of the “Caring for Natural Science Collections” one-day conference at Oxford University Museum of Natural History in 2018. ©Bethany Palumbo @bethany_bug

Given how strange this year has been we are keeping it simple. Just follow us on the week of 18th January (programme with exact dates and times to follow) on the hashtag #NatSCAConservation and we will bring the unique world of natural science conservation to you for free! Join us for this great opportunity to explore conservation work relating to the range of natural materials including bone, taxidermy, fluid preserved collections, geology, botany and entomology.

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Trials From The Riverbank: Conserving a Taxidermy Otter

Written by Jen Gossman, MSc first year Conservation Practice student at Cardiff University.

Otter mount © Jen Gossman

I received a mounted taxidermy otter in still life pose without a base from the Tenby museum, Wales where it had been in long term storage wrapped in Tyvek. On initial examination it showed some skin shrinkage and was covered in a thick layer of dirt, grease and dust.

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