Subject
- Pythagoras1
- Ramsden, J. (Jesse), 1735-18001
- Reich, Adolf, 1887-19631
- Rembrandt Harmenszoon van Rijn, 1606-16691
- Reynolds, Samuel William, 1773-18351
- Royal College of Physicians of London1
- Royal Society (Great Britain)1
- Ryckaert, David, 1612-16611
- Schmidt, Edward Allan (1825-1893)1
- Scientific apparatus and instruments1
- Scientists1
- Scientists with disabilities1
- Sherer, Aleksandr Ivanovich, 1771-18241
- Silverwork1
- Simpson, James Young, 1811-18701
- Smelting1
- Stevenson, Thomas, 1838-19081
- Surgery1
- Surgery--Study and teaching1
- Swinden, Jan Hendrik van, 1746-18231