Chemistry: Biographies
- James Dewar
- Jan Baptista van Helmont
- Jean Baptiste Andre Dumas
- Jean Baptiste Joseph Dieudonne Boussingault
- Jean Servais Stas
- Johann Jakob Balmer
- Johann Rudolf Glauber
- Johann Wolfgang Dobereiner
- Johannes (Joan) Baptista Van Helmont
- John Alexander Reina Newlands
- John Charles Polanyi
- John Dalton
- John William Draper
- Jons Jakob Baron Berzelius
- Joseph Achille Le Bel
- Joseph Black
- Joseph Louis Gay-Lussac
- Joseph Louis Proust
- Joseph Priestley
- Julius Lothar Meyer