JOUR 1001 Lecture Notes - Lecture 7: Marilyn Bell, William Thomson, 1St Baron Kelvin, Henry David Thoreau

• School: Carleton University
• Department: Journalism and Communication
• Course: JOUR 1001
• Professor: Christopher Dornan

Document Summary

France: optical telegraph, system of semaphore arms that relayed info from paris to the outer regions and out again. Rapid communication between center of authority to outer parts of. If the power grid goes out, everything will cease to work. I. e. ice storm in ottawa and montreal, people were without. By the late 1700s, amateur scientists were tinkering with electricity. Not mechanical - can"t see how it works. Scientists discovered they could make frg legs twitch - this was the inspiration for frankenstein. The first true practical application was the telegraph. Astoninging peice of engineering for the time - 1840"s. If you interrupted the current in a series of dots and dashes, you could transmit messages instantaneously. Samuel morse - credited for the telegraph in north america. Immediately patented the idea and applied to the us government for a. In 1843, us congress have him a grant of 30,000$ to build a line between washington and baltimore.