Description: Typed letter from the president of the Amercian Acoustic Company, K. G. Matheson. The letter thanks Emile Berliner and others for an acoustic solution for the Drexel Institute auditorium.
Document type:
business letter
Author: The Franklin Institute
Language: English
Place of production: Philadelphie, Pennsylvania, United States
Date: 1928-11-02
Dimensions (cm): height 27.5, width 21.4
NAC: 2013.0136
