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    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.

    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.

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Special wedding ring for the special one :

Choose Your Color :

ARTICLE INFORMATION :

When you are purchasing a wedding ring, present yourself as a smart customer to the jeweler. There are innumerable types of designs. Think about your partner?s choice and select the pure one.

ARTICLE CONTENT :

There are some people who trust everyone even when the person concerned is not trustworthy at all. If you are this kind of person then you may face problems in life, particularly regarding the choice of your life-partner. As it is important to be serious while you choose someone as your life-partner, it is also important to be choosy regarding the wedding ring. As it is going to be your companion throughout your whole life, you must not be cheated. Smartness is the first criteria to be a customer of wedding ring.

You can be smart if you have enough knowledge about the metals, styles band variations of the wedding rings. It is true that anyone will face confusion because of the large number of the stores and brands. The advertisement of different companies may perplex you. But keep in mind certain facts to avoid cheating. This article will help you to be acquainted with some of the facts.

Regarding the fact of metal there are gold, platinum, titanium, tungsten, silver and so on. Just listen to your heart and choose what it wants. Gold wedding rings are more traditional than the other. Compared to the other metals, platinum is more popular. The reason behind its popularity is its whitish glow and its durability. But you may back off for its cost. It is very costly. In these days tungsten is also becoming famous because of its durability. Even tungsten is durable than platinum. Tungsten ring never catches a scratch. It is washable also. Titanium rings are cheaper than the other metals. Moreover the black color looks gorgeous, especially when it is worn by men.

Regarding the styles of the wedding rings you have to select it. It is upon you which one you like the most. Just think about the choice of your spouse and his or her personality. Then the selection will be easy for you. The rings may be made of solid metals or they may have diamonds or any kind of gemstone added to it. While solid rings are suitable for the men, the latter is suitable for women.

Among the gemstones diamond is the most popular. There are sapphire, emerald, pearl and other gemstones. It depends upon the metal which stone you will select. Diamond is applicable to gold and platinum. Pearl is also suitable to gold. In diamond rings there are some models. You may have one diamond in the middle of the ring. There may be one or two rows of diamonds at the edges of the ring.

There are some wedding rings which have intricate designs on them. These are mostly found in gold rings. But the younger generation now wants rings without designs. Simple solid rings are their choice. For the girls you may buy the wedding rings with a single diamond. Girls like gold the most and so gold is the best choice for girls.

These facts are very important to know before you enter any jewelry store. They can cheat you by many ways. But you must be strong in your opinion about the rings.

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  • November 30, 2014Date Added :
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