Oversized 29 x 23 engineering diagram of Dr. Richard Tousey's 'Xray-Spectrographic Telescope,' an experiment carried on the Skylab space station in 1973-74, signed in black felt tip, "Jack Lousma, Pilot, Skylab II (3), July 28-Sept. 26, 1973." Includes a TLS signed "Jack Lousma," two pages, 8.5 x 11, November 27, 2020, in part: "Thank you for sending Dr. Richard Tousey's engineering diagram of his 'Xray-Spectrographic Telescope' (S054) which was flown on the Skylab Space Station during 1973-74. I believe to to be his telescope, that is, as we also had an 'Extreme UV and X-ray Telescope' (S056) onboard." He goes on to describe the mission and its experiments at length. Additionally includes a typescript of the poem 'Sermons We See' by Edgar A. Guest, signed in blue felt tip by Lousma. In very good condition, with scattered staining, a repair to the upper left corner, and several edge tears of varying length. Accompanied by a full letter of authenticity from Zarelli Space Authentication for the letter.
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