REMOVE

1. Nitrate negatives
2. Dentistry.
3. Charitable organizations.
4. Library of Congress Prints a …
5. Genthe, Arnold
6. 1869-1942

WHAT

1. Charitable organizations. (1)
2. Nitrate negatives (1)
3. Photographs (1)
4. negative (1)

WHO

1. Genthe, Arnold (1)
2. Library of Congress Print … (1)

WHEN

1. 1931 (1)
2. 1931 May 27 (1)