- Alan Walker Fine Antique Barometers
- Official website of the international specialist in antique barometers, Alan Walker. Presents a showroom as well as restoration information.
- Alex Peck Medical Antiques
- Includes a catalogue of items for sale, archives, articles, and alerts regrading common errors and fakes.
- Ars Machina
- Photographic catalog of antique scientific equipment.
- The Barometer Shop
- Provides information on the collection of mercurial and aneroid barometers with contact details.
- Duncan Robert Antiques
- Contains catalog of the collection of antique scientific and medical instruments since 1984.
- The Gemmary
- Online guide to various antique scientific instruments as well as rare books. Catalogs and ordering details included.
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