Thank you for visiting our Tesseract web site. We have been full time dealers in early scientific and medical instruments since 1982. In addition to the web site, we publish several catalogues per year, each with dozens of instruments fully illustrated, described and priced, and are now up to Catalogue 83. Please contact us if you would like a single copy ($8), or if you wish to subscribe ($30 for four issues -- approximately one year).

We are always interested in buying single items or collections.

David Coffeen, Ph.D
Yola Coffeen, Ph.D

 
Members

Scientific Instrument Society
Société International de l'Astrolabe
American Association for the History of Medicine
Medical Collectors Association
Antiquarian Horological Society
International Society of Antique Scale Collectors
Surveyors Historical Society
Early American Industries Association
The Oughtred Society
American Astronomical Society

International Coronelli Society
American Association of Museums

 
Co-Publishers
The Journal of the American Scientific Instrument Enterprise, is in its twentieth year of publication, now in a new and improved biannual format. This journal, which we co-publish, is dedicated to articles about the history of instruments made, sold, and/or used in the Americas. Subscription rates are $30 per year ($35 foreign, including air mail). All nineteen back volumes, featuring dozens of articles on all types of scientific instruments, are still available at the same rates.
 
Address

Box 151
Hastings-on-Hudson
New York 10706 USA

telephone: 1-914-478-2594

mail@etesseract.com