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99. "Dr. Draper Dead," World.

100. Draper, "First Portrait," 5. See also, n39.

101. "Dr. Draper Dead," World.

102. Root, Camera, 344-48; see also Welling Photography in America, 28-29.

103. Samuel F. B. Morse to E. N. Horsford, 20 November 1840, Eben Norton Horsford Papers, Rensselaer Polytechnic Institute, Troy, New York. For a full transcription of this letter see McManus, "Daguerreian Treasures," 254.

104. John William Draper, On the Indebtedness of New York to its University (New York: New York University Alumni Association Publications, 28 June 1853), 11.

105. Samuel F. B. Morse to Edward Salisbury, 24 February 1841, Morse papers.

106.
Draper, "Process," 222, described just such a problem with "double exposures" in his first experiments:
if the plate has not been burnt at all, perhaps the former impressions which have been obtained will re-appear. This accident frequently happened in my earlier trials, when care had not been taken to give a due exposure each time to the spirit flame. Spectral appearances of former objects, on different parts of it, emerged,--an interior with Paul Pry coming out, when the camera had been pointed at a church.
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