Catalogue of Scientific Papers
Are you looking for scientific papers from the 19th century? Most printed indexes and online databases do not cover this period. Don't fret, the Library has a resource to help; it's called the Catalogue of Scientific Papers, and is available on microfiche in the University Library. Originally published by the Royal Society, the Catalogue is an attempt to index all scientific articles from the 19th century. There is also a free online version from Gallica.