REMOVE

1. volcanic ash, lime, mineral …
2. Architecture
3. Unknown
4. Fine Arts Museums of San Fra …
5. 600
6. 600 - 750

WHAT

1. Glass negatives (1)
2. Medals. (1)
3. Photographs (1)
4. negative (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1928 (1)
3. 1942 (1)
4. between 1928 and 1942 (1)