{"id":29022,"date":"2024-05-02T11:00:46","date_gmt":"2024-05-02T15:00:46","guid":{"rendered":"https:\/\/circulatingnow.nlm.nih.gov\/?p=29022"},"modified":"2024-04-30T16:14:59","modified_gmt":"2024-04-30T20:14:59","slug":"preservation-at-the-national-library-of-medicine","status":"publish","type":"post","link":"https:\/\/circulatingnow.nlm.nih.gov\/2024\/05\/02\/preservation-at-the-national-library-of-medicine\/","title":{"rendered":"Preservation at the National Library of Medicine"},"content":{"rendered":"

Preserving a collection of material objects that represents the knowledge of many individuals and creates meaning for diverse communities is a fundamental part of the work of a national library. Libraries are stewards of stories and the data and physical materials that inform story making. The stories of eighteenth-century women botanists<\/a>, African American civil war physicians<\/a>, pioneering NIH geneticists<\/a>, AIDS activist public artists<\/a>, rural nurses of the 1930s<\/a> and many, many more are safeguarded in the collection of the National Library of Medicine (NLM).<\/em><\/p>\n

By Katherine Monroe ~ <\/em><\/p>\n

What does it take to keep a physical library collection in working order?\u00a0 In honor of Preservation Week<\/a>, let\u2019s find out by taking a look at some of the ways in which we protect the world\u2019s largest medical library and ensure its meaningful collection stays accessible today and for generations to come.<\/p>\n

Environmental Monitoring<\/h3>\n

Preservation involves more than just keeping our collection spaces tidy. A major factor in preserving our printed books and journals, manuscripts, film and magnetic media materials, and print collection involves monitoring the environment of our building, which opened in 1962.<\/p>\n

Temperature and Relative Humidity<\/strong><\/p>\n

\"Two<\/a>
Two of the Data Loggers Used to Capture Temperature and Relative Humidity in the NLM Stacks, 2024<\/figcaption><\/figure>\n

We use calibrated data loggers to measure and monitor the temperature and relative humidity of the underground collection spaces. Temperature and relative humidity have an inverse relationship: when the heaters turn on in colder months, they dry the air and the relative humidity gets lower. In the warmer months, the A\/C introduces moisture to the air as the inside temperature gets cooler, and the relative humidity increases. The A\/C introduces moisture to the air. Both humid and dry conditions present their own types of problems for the various collection materials we have onsite. Dry conditions can lead to embrittlement in paper and film, while humid conditions can lead to pest infestations, mold, or chemical reactions within the material itself. By measuring and monitoring the temperature and relative humidity of our collection environment, we are able to track that data over time to understand trends and anticipate any challenges before they happen and then work with our NLM building engineer and the NIH Office of Research Facilities to address those challenges.<\/p>\n

Lighting<\/strong><\/p>\n

\"A<\/a>
The Library\u2019s Reading Room Bathed in Light from a Row of Large Windows, ca. 1910
National Library of Medicine #101445635<\/em><\/a><\/figcaption><\/figure>\n

Exposure to light and UV radiation damages materials. Fading, embrittlement, and deterioration caused by light damage are irreversible, but limiting light exposure can help prevent this damage. Our collection is stored underground, so we don\u2019t have to worry about windows! But that wasn\u2019t always the case. Before the National Library of Medicine moved to its current building in 1962, our collection was subject to light exposure, especially in the reading room, back when we were the Army Medical Museum and Library<\/a> and had a custom-built building on the National Mall (where the Hirshhorn Museum now stands).<\/p>\n

Integrated Pest Management<\/strong><\/p>\n

\"A<\/a>
The Martinique Association of Rats, Mice, Mosquitoes, Roaches, Flies…Says, Thank You<\/em>, ca.1990
National Library of Medicine #101438046<\/em><\/a><\/figcaption><\/figure>\n

The NIH Integrated Pest Management team (IPM) supports us in monitoring pest levels. Pests, especially cockroaches, mice, and silverfish, LOVE library materials\u2014they find them both tasty and a good place to make their nests. And since we are trying to preserve our library collection and not start a new zoo, we work with IPM to prevent pesky critters from getting into the building. This also involves keeping our office areas clean and not bringing any food or drinks into the collection spaces. We also isolate incoming collection materials to make sure they are clean before integrating them into our processing and storage areas.<\/p>\n

Security<\/h3>\n
\"A<\/a>
A Guard in the Main Lobby, ca. 1960
National Library of Medicine #101701412<\/em><\/a><\/figcaption><\/figure>\n

As we\u2019ve seen in our work with other NIH offices, preservation depends on many people, not just librarians. The National Library of Medicine relies on its security guards, who are here every day and night, 24\/7, walking around the building during their inspection rounds. They are critical for monitoring and reporting any problems encountered in the collection spaces, especially when staff are offsite, and serve as sentries at the exits to make sure our collection materials remain in the building.<\/p>\n

Reformatting<\/h3>\n
\"a<\/a>
Watching a Videotape, ca. 1970
National Library of Medicine #101445884<\/em><\/a><\/figcaption><\/figure>\n

While we would love to use the original copies of everything in our collection, there are times when the best way to preserve something is to reformat it, which might include making copies or digitizing<\/a> it. Sometimes, this is because the original equipment used to play back an item (like a VHS tape or a Betacam SP) is no longer available or obsolete. And sometimes, it is because an item is too fragile or too precious to handle.<\/p>\n

The National Library of Medicine has a long history of preserving its collection through reformatting. This includes making photographic copies, like this librarian using a mobile camera in the stacks back in 1969. We also have an extensive microfilm collection. While microfilm might seem tedious to access, it is actually an important and well-respected form of preservation. Polyester microfilm is rated to last for at least 500 years, if not longer, and all you need to access it is a light source and magnifying glass! We used to make our own microfilm copies on site; here, we can see past librarians from handling microform at the library.<\/p>\n