Scientific American Reference Book Plates. Price postpaid MAGIC year. Legal Notices so YEARS' EXPERIENCi PATENTS COPYRIGHTS &O. Invention Is probably patentable. Commentate is r et-Maw:mega. INDEX OF INVENTIONS For which Letters Patent of the United States were issued for the Week Ending April 6 1909 AND BACH BEARING THAT DATE, -1909-04-17

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