Subject
- Plays (performing arts compositions)1
- Postcards1
- Printed ephemera1
- Railroad companies1
- Railways1
- Rain and rainfall.1
- Rensselaer County, New York1
- Research Notes1
- Rsums (personnel records)1
- Saddlery-New York (State)1
- Scrapbooks1
- Screenplays1
- Slaves--America--History1
- Slides (photographs)1
- Sorell, Walter, 1905-19971
- Surface chemistry1
- Technical reports1
- Thunderstorm electricity1
- Transparencies1
- Travel1