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Wooden ellipsograph (ca. 1900) now at Smithsonian Ellipsograph on display at Musée d'histoire des sciences de la Ville de Genève. An ellipsograph is a trammel of Archimedes intended to draw, cut, or machine ellipses, e.g. in wood or other sheet materials. An ellipsograph has the appropriate instrument (pencil, knife, router, etc.) attached to ...
The television goggles used small cathode-ray tubes for the display and included a separate screen for each eye, much like modern VR headsets. ... #20 Revolving Book Case, From Page 202 Of History ...
Buckle up, time travelers – we're about to take a joy ride straight back to the era of neon everything and questionable hair choices. We've gathered 26 retro-inspired treasures that perfectly ...
A display case (also called a showcase, display cabinet, shadow box, or vitrine) is a cabinet with one or often more transparent tempered glass (or plastic, normally acrylic for strength) surfaces, used to display objects for viewing. A display case may appear in an exhibition, museum, retail store, restaurant, or house. Often, labels are ...
Bookwheel, from Agostino Ramelli's Le diverse et artificiose machine, 1588. The bookwheel (also written book wheel and sometimes called a reading wheel) is a type of rotating bookcase that allows one person to read multiple books in one location with ease.
In such systems rows of bookcases are mounted on wheels and packed tightly together with only one or more aisles between them. It is possible then to visit only two bookcase sides at a time, all the others being pressed close together. A gearing mechanism allows users to move the bookcases and open the aisle in the desired location.
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