ELECTRONIC MUSIC AND INSTRUMENTS By Benjamin F. Miessner.
Published in the Proceedings of the Institute of Radio Engineers, Nov. 1936.
Below are a few of the pictures from this (slightly technical and very scarce) article from the IRE . It’s interesting how a technical person saw the state of electronic instruments at the time. For anyone new to the history, it can an eye-opener about how much had already been accomplished nearly 30 years before the Buchla, Moogs, VCS3’s and others changed the face of pop music making.
Telharmonium tone generator unit
Ranger Electronic Organ, 1931
Trautonium, commercially produced by the German Telefunken Company