A ROYAL kaleidoscope with the bold intertwined cipher of Napoleon III and Empress Eugenie.  A full set of "Microcosm" hand-painted magic lantern slides, mid-19th century, showing the diversity of life on earth.  One of three known Grimatoscopes presenting continuously animated distortions of the human face.

These are a few of the antique scientific instruments and images presented in our recent Tesseract catalogue, issue 107.  This is a special issue of OPTICAL PLEASURES, offering a wide diversity of optical devices for viewing, projecting, synthesizing, deconstructing, and distorting, as well as images enlarged, diminished or metamorphosed. They range from individual viewers to lecture hall apparatus, from microscopic photographic images, to the moon in stereo. We touch on persistence of vision, vibratory forms, standing waves, and the beginnings of animation.

Included are a set of conical anamorphic images and their reconstructing cone, metallochromes of Leopoldo Nobili, the Megalethoscope of Carlo Ponti, microscopic diamond writing on glass, original Cymatic photographic prints, and many other unusual instruments.

Prices range from $180 to $85,000, and everything is fully illustrated, described, and priced.

This recently-published catalogue normally sells for $10 per copy.  But here it is DISCOUNTED to a buy-it-now price of $8.  And we pay its postage to anywhere in the world, at no charge to the buyer.

Dozens of other items are listed on our website: www.etesseract.com

We are full-time dealers in early scientific and medical instruments, publishing catalogues since 1982.  Our customers include important museums of the history of science, worldwide, as well as collectors and dealers.

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