books.google.co.uk - Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59....http://books.google.co.uk/books/about/Journal_of_the_Franklin_Institute.html?id=e9YGAAAAYAAJ&q=valves&utm_source=gb-gplus-shareJournal of the Franklin Institute
