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    WIRELESS TELEPHONE AT WHITE HOUSE
    November 21, 1919 - White House, U.S.A.

    President Wilson used a radio telephone set up on the south portico of the White House to direct the maneuvers of a dozen army airplanes flying over the Potomac river several miles away. His telephoned directions went direct to the flight commander in the air. The instrument was similar to those used by American aviators in France in the latter part of World War I. Col. C. C. Culver actively developed the equipment. He began the project in Aug 1910. No new invention was needed, only adaptation and adjustment of existing techniques. By Aug 1916, he was able to send a radio telegraph signal from a plane. Enlisting expert help from the telephone companies, by Oct 1917, voice messages could be send between a plane and the ground. The system was put into service for military wartime use.

    EDISON'S PHONOGRAPH
    November 21, 1877 - New York City, U.S.A.

    Thomas Edison announced his invention of his "talking machine" - the tin-foil cylinder recorder that preceeded the phonograph. He appears to have envisioned it as a business dictation machine. In Sep 1877, he wrote that its purpose was "to record automatically the speech of a very rapid speaker upon paper; from which he reproduces the same Speech immediately or years afterwards preserving the characteristics of the speakers voice so that persons familiar with it would at once recognize it." The indented tin foil, however, would survive only a few playings. By the first public showing of a phonograph, which took place in New York City in early Feb 1878, its practical applications had not yet been realized.

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  • The wealth of the nation
    by Earth Day, Gaylord Nelson

    "...The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity that'as all there is. That'as the whole economy. That'as where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world...."
  • The Revolution
    by John Adams

    "...The Revolution was effected before the War commenced. The Revolution was in the minds and hearts of the people; a change in their religious sentiments of their duties and obligations. This radical change in the principles, opinions, sentiments, and affections of the people, was the real American Revolution...."

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  • Drug Abuse
    about Facts about Drugs

    Facts about drugs can protect against drug abuse. Legal drugs, such as alcohol and tobacco, kill more people than illegal drugs. Tobacco (smoking cigarettes) kills more people than any other drug. Illegal drugs including heroin, cannabis, ecstasy and amphetamines can have unknown or dangerous ingredients. Mixing drugs, especially with alcohol, can be fatal. Harvard Medical School
    about Eyesight Myth and Fact

    Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable.

All About Symbols :

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The article is dedicated to the descriptions of symbols and their role in our life. Much emphasis is paid to the significance of symbols used in works of art.

ARTICLE CONTENT :

Symbols are objects, pictures, written words, sounds or something like that and imply ideas, thoughts, notions, feelings and beliefs. A number of them are very common, like white rectangle on red background referring to "STOP" ,others have particular meaning and evoke deep emotions. For instance, such symbols are the Judaic Star of David or the crucifix in Christianity.

We are surrounded by symbols. Every day we are faced with something that has a symbolic sense. You may see symbols on money, in books, commercials, music compositions, politics etc. To understand the significance of a symbol a person has to know what this symbol refers to. For example, the Chinese symbol of yin and yang looks like an amusing image with white and black colors for people that don't know the underlying significance of the sign. They can enjoy its aesthetic side, but they do not see more than that. On the contrary, in case a person understands the origin of the symbol he sees not just a picture, but an idea of deep correlation of things in our lives.

During the history of humanity symbols were widely applied in art. So, one item on a painting tells a lot about the situation, the concepts of the painter, his views on life and aspirations. To understand the secret significance of a book or a music composition we need to be very attentive to details. Every now and then we need to read critics on a definite piece of art so as to get the idea of the author. This is because the symbols language isn't so simple. So what are the most popular symbols in art and what do they stand for?

Amidst the most common symbols applied in works of art are a book, a candle, a clock and mirrors. A book generally implies knowledge and learning. If you see a lightened candle on a painting it is in most cases a symbol of religion or time passing. On the other hand, a put-out candle implies death and mourning. A clock refers to the time passing. On this point the world-known painting of Salvador Dali called "Melting clocks" implies an idea that nothing in our lives is in keeping with some rules. And eventually, a mirror stands for attempts to get the truth, but in some cases it just implies the vanity.

In such a way, symbols are everywhere in our world. We just need to pay a little more attention to details to see them.

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