Curiosidade: conheça algumas invençoes canadenses

Curiosidade: conheça algumas invençoes canadenses

Mark Twain in Nikola Tesla's apartment, New York 1894    The high-voltage current is being passed through the human body to bring the lamp to incandescence. Tesla's friend, Mark Twain, is holding the loop above the resonating coil. Tesla is in the background.    Originally published as part of an article by T.C. Martin called "Tesla's Oscillator and Other Inventions" that appeared in the Century Magazine (April 1895)

Mark Twain in Nikola Tesla's apartment, New York 1894 The high-voltage current is being passed through the human body to bring the lamp to incandescence. Tesla's friend, Mark Twain, is holding the loop above the resonating coil. Tesla is in the background. Originally published as part of an article by T.C. Martin called "Tesla's Oscillator and Other Inventions" that appeared in the Century Magazine (April 1895)

Vintage is always in! Old school telephone

Vintage is always in! Old school telephone

Thomas Alva Edison had a thirst for learning, but left school early because he was hearing impaired and couldn’t hear what his teachers were saying. He was homeschooled by his mom. In this mini biography of him, you will learn about his accomplishments, and his persistent nature. You will see the major steps he took which contributed to his success. We learn from Edison the importance of taking action.

Thomas Alva Edison had a thirst for learning, but left school early because he was hearing impaired and couldn’t hear what his teachers were saying. He was homeschooled by his mom. In this mini biography of him, you will learn about his accomplishments, and his persistent nature. You will see the major steps he took which contributed to his success. We learn from Edison the importance of taking action.

The inventor of electricity and with the idea of being able to have free and infinite amount of energy for the entire world.

The inventor of electricity and with the idea of being able to have free and infinite amount of energy for the entire world.

John D. Rockefeller(1839 - 1937) raised himself up to become the richest man in the history of the world. At one point, he possessed the equivalent of $1 trillion dollars today's money -- and there were no income taxes then. He started as a bookkeeper, went into groceries and eventually bought refineries & oil wells, which became Standard Oil. For awhile he owned almost all the oil fields & facilities in America. He spent the last 40 years of his life supporting charities and good causes.

John D. Rockefeller(1839 - 1937) raised himself up to become the richest man in the history of the world. At one point, he possessed the equivalent of $1 trillion dollars today's money -- and there were no income taxes then. He started as a bookkeeper, went into groceries and eventually bought refineries & oil wells, which became Standard Oil. For awhile he owned almost all the oil fields & facilities in America. He spent the last 40 years of his life supporting charities and good causes.

Alexander Graham Bell: In the 1870s, two inventors Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech electrically (the telephone). Both men rushed their respective designs to the patent office within hours of each other, Alexander Graham Bell patented his telephone first. Elisha Gray and Alexander Graham Bell entered into a famous legal battle over the invention of the telephone, which Bell won.

Alexander Graham Bell: In the 1870s, two inventors Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech electrically (the telephone). Both men rushed their respective designs to the patent office within hours of each other, Alexander Graham Bell patented his telephone first. Elisha Gray and Alexander Graham Bell entered into a famous legal battle over the invention of the telephone, which Bell won.

Young mine worker, Utah or Colorado, late 1800s

Young mine worker, Utah or Colorado, late 1800s

Alexander Graham Bell: originally wanted people to answer the telephone with "ahoy!" instead of "hello!"...

Alexander Graham Bell: originally wanted people to answer the telephone with "ahoy!" instead of "hello!"...

Adolf Hitler strikes a pose for photographer Heinrich Hoffmann while listening to a recording of his own speeches, 1925. After seeing the photographs, Hitler ordered Hoffmann to destroy the negatives, but he disobeyed.

Adolf Hitler strikes a pose for photographer Heinrich Hoffmann while listening to a recording of his own speeches, 1925. After seeing the photographs, Hitler ordered Hoffmann to destroy the negatives, but he disobeyed.

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