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Sphere's site contains an original e-library, including quotes, business practices and ethics, short stories and columns. Plus, an Electronic Test Equipment and ...

www.antiqbuyer.com Internet antique seller of antique tools, technology and scientific related antiques from the home, shop, and office

Stock photography, travel photography, and nature photography and graphics for online and publication use.

The Barometer Shop is the country's leading specialists in the buying, selling, repair, and restoration of antique mercurial and aneroid barometers, clocks and ...

Slide Rule Museum/Library/Encyclopedia

A wunderkammer of antique medical, surgical and dental instruments. Photographs and related articles illuminate a history of medicine within a searchable database ...

Moonstick Co. is the designer and manufacturer of manual visual calculators for astronomy, timekeeping, and computation