This was a device for transmitting and receiving messages over long distances. Helped by a young engineer called Alfred Vail, our inventor created a device which received pulses of electricity and converted them into a code based on dots and dashes. It was necessary to lay thousand of miles of wire to connect different places.

One century later, this device covered the world with a large and complex network that allowed to communicate every part of the world. As important as the new device was the new code based on pattern of pulses. This idea is now used for all kinds of telecommunications. 

 

It was a three-wheeler carriage propelled by a single-cylinder engine. This engine was developed  by Otto  and  it  worked as  four-stroke engine, using a mixture of petrol and  air  to  be burnt. The engine, below the driver's seat, moved the wheels by using  a  long chain.
 It was the first  automobile  in the world. Further  developments  in  gears, breaks and suspensions allowed to build up the modern cars. 

This device had some more consecuences in the near future:  Industrial growth for its creation; the possibility of transporting ourselves in less time, with less effort, in a more secure way, especially in longer distances; since then different car brands have emerged both in Europe and in the rest of the world, always trying to be a step ahead in the technology that is used...etc

First automobile. Karl Benz. (explanation)  (The first three minutes)

The gramophone was a device which reproduced sounds, it usually repruduced music. In shorts, it worked with a needle that went arround the surface of a turntable that spinned and that produced a vibration which the gramophone traduced in sounds.

The gramophone was very important because it stirred up the history of music and entertaiment thanks to the fact that this device improved the sound quality a lot of.

Here I share you a video of how it works. The video is in English, it has not got subtitles but you can understand perfectly how the gramophone works only seeing what the man does.

https://youtu.be/ncoQzlp8zg8

After a large number of experiments, he discovered a chemical reaction with Sulphur that made the raw rubber from the trees harder and stronger. Sulphur reduced the stickiness and the weakness of the raw material. This way of making rubber harder was called vulcanization.

It is essential today for car tires and many other rubber items.

https://youtu.be/1o9mVZxoayA

Gases get hot when they are compressed and cool down when they expand. This device worked moving some fluid inside a circuit that changed from liquid to gas when it expanded. As a result of this, it absorbed all heat from the inside box that we called fridge. 

This device was absolutely neccesary to keep meat, vegetables and fresh friut fresh and preserved them for a long time.

https://youtu.be/EIP3pSio7-M
https://youtu.be/h5wQoA15OnQ