In connection to the foundation of the Königliches Cabinet der mathematischen und physikalischen Instrumente, at first, special documents corresponding to the objects in the collection were stored. Additionally, some standard works to the topics of the collection and similar topics were bought. In connection with the foundation of the observatory at the Mathematisch-Physikalischer Salon in 1784 the history of astronomy and their corresponding scientific instruments were the main focus for the further improvement of the library.