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Figure 1
Daguerreotypes of (a) an unidentified woman (conservation study collection) and (b) an unidentified man and woman (accession number PSC70:112) both from the NGC, ca. 1850s. Areas examined with SEM–EDX and synchrotron-radiation XRF are marked.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 5| September 2019| Pages 1679-1686
https://doi.org/10.1107/S1600577519006313
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