Note: 19th century authors often published multiple versions or translations of the same paper in different journals. The Royal Society's Catalogue of Scientific Papers is the best tool for identifying these variants.
CAS has carried out selective retro-indexing of pre-1907 literature:
Various scanned library copies are also available via the Internet Archive.
CAS has added some machine-translated records from the 1897-1906 period to the CAPLUS file. CZ has been digitized by FIZ CHEMIE Berlin for purchase as an intranet database. A structure-searchable database version of CZ is available from InfoChem.
GETTING THE ARTICLE
While retrospective digitization is progressing in both the open-access and commercial spheres, much of this early content still exists only in printed form,.
See also the pathfinder on Chemical Biography.