Subject
- Hooker, Samuel Cox, 1864-19351
- Hormones1
- Hydrogenation1
- Hydrogenation--Research1
- Indigo1
- Industrialists16
- Internal combustion engines1
- International Union of Pure and Applied Chemistry2
- Inventors3
- Ittner, Martin Hill, 1870-19451
- Johns Hopkins University1
- Journalists2
- Little, Arthur D. (Arthur Dehon), 1863-19352
- Manufacturing industries1
- Marshall, Albert Edward, 1883-1
- Massachusetts Institute of Technology3
- Medical education1
- Mendeleyev, Dmitry Ivanovich, 1834-19071
- Metallurgy1
- Midgley, Thomas, 1889-19441