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Subjects
- Rhus1
- Rittenhouse, David, 1732-1796.1
- Romania1
- Romayne, Nicholas, 1756-1817.1
- Rome1
- Rowley, William, 1742-1806.1
- Royal College of Physicians of Edinburgh.1
- Royal College of Physicians of London.1
- Royal Medical Society of Edinburgh1
- Royal Veterinary College (London, England)4
- Rubber -- therapeutic use1
- Rubiaceae1
- Ruminants1
- Rush, Benjamin, 1746-1813.1
- Russell, Thomas, 1740-1796.1