The free images, uploaded courtesy of the Biodiversity Heritage Library, include animal sketches, historical diagrams, botanical studies, and scientific research.
Emile-Allain Séguy was enamored with the overlooked wonders of the natural world.
Field books capture essential information for ecological history but are often difficult to track down in scientific collections.
The first book to illustrate a pencil was published in the 16th century, and its author was more interested in the properties of the lead than the implement itself.
In Latin American natural history, the achievements of outsiders often eclipse homegrown science and study, but Latino Natural History, a digital exhibition that launched this month, spotlights their contributions.