Opel-RAK were a series of rocket vehicles produced by Fritz von Opel, of the Opel car company, in association with others, including Max Valier and Friedrich Wilhelm Sander largely as publicity stunts.
The Lippisch Ente a rocket-powered glider was produced on June 11, 1928, piloted by Fritz Stamer, but is not usually considered part of the series.
Opel RAK.1 - a rocket car that achieved 75 km/h (47 mph) on March 15, 1928
Opel RAK.2 - rocket car May 23, 1928 reached a speed of 230 km/h (143 mph) driven by 24 solid-fuel rockets
Opel RAK.3 rocket train (quoted speed is variously 254 or 290 km/h. See: , , , , ) On the second run the train jumps the track and is destroyed.
Opel Rak IV rocket train, destroyed when a solid rocket explodes on the track, exploding all the other rockets. Railway authorities prohibit further runs.
Opel RAK.1 rocket glider September 30, 1929
Some stock footage of some of the rocket vehicles was incorporated into this early SF film.
This was one of a series of postwar ads for magnesium, which illustrated how the miracle metal would allow consumers to do things nobody would ever want to do, like carry a baby carriage on your shoulder.
In 1954, DuMont came out with a "Duoscopic" TV set that allowed two people to watch different programs on the same set, simultaneously. From Newsweek (Jan 11, 1954):
"When a husband wants to look at the fights and his wife prefers a situation comedy, the Duoscopic provides both at the same time. The set contains two screens and a special mirror that throws one picture onto the other, creating a double image. Polaroid windows filter out the unwanted image, and special earphones carry the separate sound tracks."
It was priced at $600. So in 2015 money, that would be approximately $5304 (according to the US Inflation Calculator). At that price tag, it made more sense for couples with different viewing preferences to just buy 2 TV sets and sit in separate rooms.
There's more info about the Duoscopic TV at the Early Television Museum. On that site, there's also speculation that DuMont originally developed the Duoscopic TV as a 3D TV, but decided they couldn't get that to work fully, so they repackaged it as a "watch 2 channels simultaneously" TV.
Here's my question: who the hell ever first thunk up this elaborate, non-intuitive processing of gypsum, a rock out of the ground? The ingenuity of mankind and our genius ancestors is awesome and baffling.
A woman who left the scene after she rear ended someone got turned in by her Ford vehicle via the automated emergency assistance system. When contacted by the dispatcher she tried to deny the accident but when police came out the car gave her away, again, due to all the damage.