The Royal Society's Catalogue of Scientific Papers 1800-1900 (CSP) is the latest addition to the 19th Century Masterfile (mentioned last week when the links to legal journals were added).
The original author-index catalogue covered 19 chronological volumes. Subsequently, three Subject Indexes were published. CSP indexed 1,555 periodicals in numerous languages, and included the transactions of the European academies and other learned societies.
Two major installments are now online for searching through 19th Century Masterfile:
Installment 1: The three Subject indexes produced by the Royal Society covering Pure Mathematics (1908); Mechanics (1909); and a 2-volume set covering Physics (1914).
Installment 2: Volumes 13-19 covering 1884-1900, containing over 400,000 citations.
The Library has a reprint edition of the original printed index in the Science Reference Collection (Level M in the Library, call number 016.5 R88).