Inventions+(1-+4+)

The telegraph was a system used to communicate through transmitted electric signals over wires from one location to the next which translated into a message. The non-electric telegraph was invented by Claude Chappe in 1794. It was visual and used semaphore communication. It also needed a line of sight to communicate. Although, the electric telegraph was soon replaced by the optical telegraph. In 1809, Samuel Soemmering created an undeveloped telegraph that used 35 wires with gold electrodes in water. When he did that the receiver could get the message 2,000 feet away and it was read by the amount of gas cause by electrolysis. In 1828 the first telegraph invented in the US was invented by Harrison Dyar. It sent electical sparks through chemically treated paper tape to burn dots and dashes. Over the years the telegraph has been improved upon to work better and easier. The telephone took it's place in 1877. Now it's the main source of communication today. Our prediction for the future is that it will only advance more.
 * Telegraph:**

http://inventors.about.com/od/tstartinventions/a/telegraph.htm

The first railroad was horse drawn until the locomotive steam engine was invented. The innovations for railroads came in phases starting with the wagon with wheels then it progressed to wooden rails and horse drawn wagons. Then a couple of stages later we have electric steam engines that are able to pull 5 string steel cars over steel rails. There is no exact person who invented the railroad but many all over the world contributed to the railways that are present today. Now railroads aren't used much for transportation of people because we have cars and airplanes to take us places. They're used mostly for tansporting goods from one place to another. In the future we think that railroads will become a thing of the past because technology is getting so advanced we simply won't need them.
 * Railroads:**

http://inventors.about.com/library/inventors/blrailroad.htm

Thomas Alva Edison invented incandescent light bulbs in 1879. The first central commercial incandescent electric generating station gave one square in New York electricity in 1882. Nikola Tesla, one of Edison's employees, wanted to use alternating current(AC) instead of direct current(DC), but Edison thought AC was more dangerous so he opposed it. Tesla broke away from Edison and finished his invention in 1888. George Westinghouse then hired Tesla to sell the AC transmission. Everyone but Edison fell in love with AC. So now everything that uses electricity runs on AC transimission. We think electricity will be a huge deal in the future because most technology runs on some form of electricity. media type="file" key="Light Bulb.mp3"
 * Electricity**

http://www.heartland-rec.com/safety3.html

Its better then all the others because it is safer and easier to use then all the others.
 * Bessemer Process of steel production:**

http://www.bartleby.com/65/be/Bessemr-pro

Group 4