Dealer Profile

TESSERACT -- Early Scientific Instruments

David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at http://www.etesseract.com, and can be contacted at mail@etesseract.com.  Their offerings include globes of all types, plus the surveying and drafting tools used to make maps and charts and globes over the past 500 years.

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