Subject
- Cohen, Ernst, 1869-194429
- Citizenship27
- Scientific apparatus and instruments27
- Carte de visite photographs26
- Laboratories26
- Noncitizens25
- Universität Leipzig (1409-1953)25
- Patents24
- Reis, Alfred J., 1882-195124
- Visiting cards24
- Applications for positions22
- Einstein, Albert, 1879-195522
- Periodicals22
- Telegraph22
- New York times21
- Portraits21
- Princeton University21
- Bredig, Rosa, 1877-193320
- Nuclear energy20
- Refugees20