Subject
- Lie detectors and detection1
- Light absorption1
- Linné, Carl von, 1741-17831
- Liqueurs1
- Liquid chlorine1
- Liquid chromatography1
- Liquors1
- Lockett, Robert L.1
- Lomonosov, Mikhail Vasilʹevich, 1711-17651
- Los Alamos Scientific Laboratory1
- Low-calorie diet1
- Lucite1
- Lunar Society of Birmingham (England)1
- Lydia E. Pinkham Medicine Company1
- Lyell, Charles, Sir, 1797-18751
- Lyman, Henry M. (Henry Munson), 1835-19041
- MacDiarmid, Alan G., 1927-20071
- Macartney, James1
- Magic tricks1
- Manufactures1