Use the resources on this page to access digitized primary source documents related to Italian scientists. For more information on what primary sources are and how they can be used in research, visit International Databases on History of Science Sources.
Google Books is extremely useful, because it searches the complete text of a book. It can help you find books that may not come up in the library catalog. When you find a book that looks good, then do a "Title starts with" search in SEARCH to see if the Library has it.
As of 2019, Google Books contained over 40 million scanned books. Many from before 1925 are available full-text.