Phonograph-
When you spoke into the mouthpiece, the sound vibrations of your voice would be indented onto the cylinder by the recording needle. This cylinder phonograph was the first machine that could record and reproduce sound created a sensation and brought Edison international fame.
Light Bulb-
Edison decided to try a carbonized cotton thread filament. When voltage was applied to the completed bulb, it began to radiate a soft orange glow. Just about fifteen hours later, the filament finally burned out. Further experimentation produced filaments that could burn longer and longer with each test. Even though it is over a hundred years old, this bulb looks very much like the light bulbs lighting your house right now. The base, or socket, on this 19th century lamp is similar to the ones still used today.
Stock Ticker-
A stock ticker is a means by which stock prices are conveyed in real time to investors. At one time, a stock ticker was a machine which used telegraph technology to transmit this information onto paper or "ticker tape," but with the advent of television and computers, today's stock ticker is a simulated ticker display.
When you spoke into the mouthpiece, the sound vibrations of your voice would be indented onto the cylinder by the recording needle. This cylinder phonograph was the first machine that could record and reproduce sound created a sensation and brought Edison international fame.
Light Bulb-
Edison decided to try a carbonized cotton thread filament. When voltage was applied to the completed bulb, it began to radiate a soft orange glow. Just about fifteen hours later, the filament finally burned out. Further experimentation produced filaments that could burn longer and longer with each test. Even though it is over a hundred years old, this bulb looks very much like the light bulbs lighting your house right now. The base, or socket, on this 19th century lamp is similar to the ones still used today.
Stock Ticker-
A stock ticker is a means by which stock prices are conveyed in real time to investors. At one time, a stock ticker was a machine which used telegraph technology to transmit this information onto paper or "ticker tape," but with the advent of television and computers, today's stock ticker is a simulated ticker display.