Recording and Preserving Music: A History of the Phonograph

Have you ever wondered how the process of recording, preserving, and playing music was carried out in the early years of phonograph records?

Recording and Preserving Music: A History of the Phonograph
Patent for a case to preserve and arrange phonograph records called "disquero universal". Images and text: AGN, Independent Mexico, Public Works and Development, Patents and Trademarks fund, file 4, exp. 64.