The Linda Hall Library in Kansas City, Missouri, bills itself as "the world's foremost independent research library devoted to science, engineering, and technology." Here, readers around the world can access the library's digital collections which boast nearly 250,000 images from its extensive History of Science Collection. These digital collections allow visitors to explore "significant, rare, and fragile items" from the Linda Hall collections, including a 15th-century edition of Pliny the Elder's Naturalis Historia (the library's oldest book), a copy of the esoteric text Canon Chronicus Aegyptiacus owned by Isaac Newton, and one of William Herschel's handwritten notebooks containing his thoughts on optics and mathematics. Readers can also explore more than 20 themed collections (found by hovering over the collections link on the main page), some of which were inspired by previous library exhibitions. Topics are quite diverse and include the lengthy history of parachutes (and related devices), the even lengthier history of technologies for telling time, and a collection that "document[s] the discovery and acceptance of pre-historic man." Visitors can easily search the entire digital collection by keyword and filter the results by collection, creator, date, and subject, and the site also has an advanced search feature to search multiple fields simultaneously.
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