Studie Martina Voříška je věnována hudebnímu životu na zámku v Českém Krumlově v roce 1780. Autor jej sleduje prostřednictvím neobvyklé události. 12. srpna 1780 totiž byla vykradena knížecí pokladna, z níž se ztratilo více než 950 zlatých. V té době ji měl na starosti kancelista a dvorní hudební ředitel Antonín Jan Jüngling. Aby se zbavil z podezření, že byl pachatelem tohoto činu, vytvořil detailní soupis své denní činnosti, díky níž tak zcela mimoděk vznikl unikátní dokument reflektující činnost schwarzenberské kapely v té době. Výňatky z tohoto dokumentu, jež se týkají hudby, jsou citovány v příloze., The article is based on a lengthy report by Anton Johann Jüngling on his own activities on 12 August 1780; Jüngling was at the time the Schwarzenbergs’ music director and also a highly placed official. This unique historical source affords a very detailed look at Jüngling’s daily life as a person and a professional, and in combination with other sources, it also enables the creating of a quite detailed picture of the musical events at the Schwarzenberg court over a period of just under two weeks, when the Schwarzenbergs were staying in Český Krumlov with their guests. The musical activities included theatrical performances, a ball, a private concert with repertoire consisting of orchestral arrangements of music from singspiels currently being performed (Die schöne Schusterin and Die abgeredte Zauberey), and accompaniment for worship services. The study documents that the musicians at the princely court were able to secure the music for most of these occasions, and that they were supplemented or substituted for as needed by hired musicians from the town or the military., Martin Voříšek., Rubrika: Studie, and Anglické resumé na s. 141-142, anglický abstrakt na s. 117.
Measuring the speed of sound propagation in metals is easy and fast, and is not only for the laboratory. With the use of a smartphone, ruler, rosin, and vice we can measure speeds for steel, brass, aluminium, and plastic. Values differ by a few percent from the tabulated values. Following determination of the density of the material, it is also possible to determine the Young's modulus of elasticity. This method presents an opportunity for students to take physics into their own hands.