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![[Society of the Sigma Xi membership diploma for William Hough Cook, Jr.]](https://digitalcollections.museumofflight.org/files/square_thumbnails/98cfee3d52125e0482922681dcc2c10b.jpg "[Society of the Sigma Xi membership diploma for William Hough Cook, Jr.]")
Membership diploma for William Hough Cook, Jr., issued by the Rensselaer Polytechnic Institute chapter of the Society of the Sigma Xi, September 27, 1933.