18 Models goes back to the early years of the educational institution and is linked to the name of Johann Andreas Schubert, who was probably the most universal of technical scholars in Saxony at that time. From 1850, following the appointment of Julius Ambrosius Hülsse as Director of the Polytechnical School, the technology profile of mechanical engineering education became increasingly important. It is therefore not surprising that what are arguably the oldest technological material witnesses were gathered together in the Mechanical-Technological Collection. The collection, which was founded by Hülsse, underscores the great significance of the subject of mechanical technology as an intermediary for hands-on training. In order to demonstrate essential production areas and common processing procedures, this collection of teaching materials draws mainly on raw materials, semi-finished products, tools and finished products from the metal, wood and textile processing industries, which were often arranged systematically on educational charts and tableaus. A specific collection of geodetic instruments was assembled by August Nagel and has been continuously expanded since 1852. Today, the Collection of Astronomic-Geodetic Instruments contains some 150 historically significant instruments. Among them is one of the most valuable museum objects owned by TUD Dresden University of Technology: the Repsold Universal Instrument dating back to 1863. It is a testament to Nagel’s farsightedness, but also to that of the school authorities, that they acquired such an instrument in preparation for the triangulation and cartographic representation of the Kingdom of Saxony carried out between 1867 and 1878. The roots of the collections of mathematical models, physical and chemical apparatuses, and of the mineralogical and geological collections also date back to the foundation phase of TUD. Parts of the latter collection are still used for teaching purposes today. The core of the Botanical Collection with its valuable herbaria (The Herbarium Dresdense − international abbreviation DR) was transferred from the Natural History Museum in the Zwinger to the Tableau with gray cast iron parts (around 1870) formed on an insert molding machine Mechanical-Technological Collection Gear model after Johann Andreas Schubert (1833) In 1830, Johann Andreas Schubert took over the teaching of Constructive Geometry and Mechanics. According to his wishes, Johann Gottlieb Rehme, the model maker of the Royal Model Chamber, produced a series of models and thus laid the foundation of the Collection of Mechanism and Gear Models. The models no longer depicted entire machines, as had been customary until then, but only individual mechanisms. In this model, three variants for translating a circular motion into a linear motion are shown. (Photo: Franz Zadnicek, Dresden)
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