Famous Scientists :
Benjamin Franklin was an American Scientist. He was the one who tried to prove that “Charge generated by friction in a Leydan Jar is the same as that is generated in a thunderstorm”
One day, he attached a long wire to a kite and flew it high. To the other end of the wire was attached a key.
Whenever he saw a lightening he touched the key. Once he did so, he experience a strong shock as he expected. This was the proof that lightening is a build up of static electricity.
In the year 1769, James Watt invented the Steam Engine. James Watt was a Scottish engineer. His findings created a great revolution in Mankind.
Only because of James Watt’s invention, i was possible to pump out water from coal mines. It was very normal for coal mines in England to get filled with rainwater now and then. If there was no option to pump out water from the mines, there would have been a lot of backlogs in many industries. James Watt wonderfully designed an equipment used steam for this purpose. The same kind of steam engine was later used to drive ships.
Edward Jenner was a British doctor who lived in a period when Small Pox was a common and severe disease. People from all classes approached Jenner with Small Pox. Seeing the sufferings of people he wanted to bring about a solution to this problem. That was when he observed that a particular set of people (Milkmaids) did not get affected from Small Pox, but they were affected with a disease, Cow Pox.
Jenner then took a pus like liquid from the sores that came from the boy who was affected with Cow Pox. He injected the same to a little boy who was affected with Small Pox. The boy got Cow Pox but soon recovered from Small Pox. He then injected Small Pox germs to the same boy. It was a great wonder that the boy was not affected by Small Pox then. That is how, Edward Jenner gave the great idea of Vaccination in order to prevent many deadly diseases.
Vaccination is a method of protecting people from great diseases. This can be done by injecting a mild form of the disease so that the same person does not get affected by the disease later in life.
The Small Pox vaccine was a breakthrough since after that vaccines for Polio, Typhoid, Cholera, Plague, Tetanus, Tuberculosis, Yellow Cough, Whooping Cough and so on were discovered. Most vaccines are injected but Polio Vaccine is still been treated orally.