Subject
- Robert, Anne-Jean, 1758-18201
- Robert, Nicolas Louis, 1761-18281
- Rosemary1
- Rosicrucians1
- Rothmaler, Erasmus1
- Royal Institution of Great Britain1
- Royal Society (Great Britain)1
- Salt1
- Salt springs1
- Saltpeter1
- Sapphires1
- Scabies1
- Scales (Fishes)1
- Scales (Weighing instruments)1
- Scallops1
- Scientists1
- Scotland--Antonine Wall1
- Scotland--Glasgow1
- Scotland--Shetland1
- Sea birds1