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* [https://archive.org/stream/scientificpapers01maxwuoft#page/n39/mode/2up On the description of oval curves] by James Clerk Maxwell | * [https://archive.org/stream/scientificpapers01maxwuoft#page/n39/mode/2up On the description of oval curves] by James Clerk Maxwell | ||
* [http://arxiv.org/pdf/math/0702005v1.pdf Semidefinite Representation of the k-Ellipse] | * [http://arxiv.org/pdf/math/0702005v1.pdf Semidefinite Representation of the k-Ellipse] | ||
==== Kits ==== | ==== Educational Kits ==== | ||
* [[wikipedia:de:Anker-Steinbaukasten|Anker-Steinbaukasten]] | * [[wikipedia:de:Anker-Steinbaukasten|Anker-Steinbaukasten]] | ||
* [http://www.lectron.de/|Lectron Elektro-Baukasten] | |||
* LEGO, KNEX, LEGO-Mindstorms ... | |||
==== Sewing Boxes ==== | |||
* [http://collections.lacma.org/node/178749 Sewing Box with Implements] | |||
* [https://www.youtube.com/watch?v=4FQoeVWsHsY Sewing Box Cabinet] by Kiki van Eijk | |||
==== Tool Boxes ==== | |||
* [[wikipedia:Survival_kit|Survival Kit]] | |||
* [http://juan.choriticos.net/fotos/delft/36/zurich/20030713/p1010009-11-0-2.shtml Dentist Toolkit] | |||
* Pictures of [https://www.google.de/search?q=surgical+set&tbm=isch surgical sets] and [https://www.google.com/search?q=werkzeugkoffer&tbm=isch tool boxes] | |||
== Knots and Splices == | == Knots and Splices == | ||