Subject
- Geological surveys15
- Alloys13
- Garrett, Thomas H.13
- Precious metals13
- Preston, Robert E., 1836–191113
- Silver--Refining13
- Washington, J. G.12
- Gold--Refining11
- Lectures and lecturing11
- McCulloh, R. S. (Richard Sears), 1818-189411
- Geological Survey (U.S.)10
- Snowden, James Ross, 1809-187810
- Bolton, Henry Carrington, 1843-19039
- Booth, Ann, 1772-18559
- Faraday, Michael, 1791-18679
- Laboratories9
- Silver9
- Societies9
- Baker, T. Roberts8
- Linderman, H. R. (Henry Richard), 1825-18798