Digital Library: Natural and Physical Sciences

Index Animalium

Compiled over 43 years by one man this index to every living animal discovered between 1758 and 1850 is still considered the essential reference for zoologists and paleontologists.

Instruments for Science

A collection of uniquely valuable trade literature that tells the history of 19th c. science through instrument catalogs.

Taxonomic Literature 2 online

Online version of Taxonomic Literature 2, the premier guide to the literature of systematic botany.