Subject
- Lodge, Oliver, Sir, 1851-19401
- Lorentz, H. A. (Hendrik Antoon), 1853-19281
- Lorenz, Richard, 1858-19151
- Lottermoser, Alfred, 1870-19451
- Love, Richard Conder1
- Lucas, G. H. W1
- Luggage1
- MacBain, James Willian, 1882-19531
- Mach, Ernst, 1838-19161
- Machinery industry1
- Madsen, Thorvald1
- Madsen, Thorvald, 1870-19571
- Mahrenholz, Rolf1
- Manuscripts1
- Marck, A.1
- Marine Biological Laboratory (Woods Hole, Mass.)1
- Marrack, John Richardson, 1886-19761
- Married people1
- Marshak, Robert E. (Robert Eugene), 1916-19921
- Massachusetts Institute of Technology1