[78-L] Advent of Electrical Recording

[fnarf at comcast.net]

I have a dumb question that's been bugging me for a while now. Everyone knows that electrical recording arrived in 1925. How sudden was the change? Did everybody change at once? Did some labels continue to record acoustically for some time afterwards? What happened to all the acoustical gear -- did they just throw it out, or did they pass it on to some other use, perhaps a cheaper auxiliary studio, or a budget label or something? What's the last known acoustical recording?