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TODAY IN HISTORY

    PITOT TUBE
    November 12, 1732 - Academy of Sciences, Paris

    Henri Pitot read a paper to the Royal Academy of Sciences in Paris about an instrument he had invented to measure the flow velocity at different depths of water in the River Seine. It had a scale and two open vertical glass tubes on a wood frame. The lower end of one pointed down, the other bent at 90 facing the flow. The belief of the time was that flow velocity at a given depth was proportional to the mass above it, meaning increasing velocity at greater depth. Recording the difference in liquid levels in the two tubes, he showed the opposite was true. Henri Darcy improved the design, with the support of Henri Bazin. Today, the Pitot tube has an important application in aerodynamics for the measurement of the airspeed of aircraft.

    POLYPROPYLENE
    November 12, 1999 - Bartlesville, Oklahoma, U.S.A.

    In Bartlesville, Oklahoma, a plaque was placed on the site of the laboratory where the polymer polypropylene was invented, designating it a National Historic Chemical Landmark by the American Chemical Society. The first commercially successful use of the new material was in the Hula Hoop®. In 1951, J. Paul Hogan and Robert L. Banks, research chemists working for Phillips Petroleum Company, discovered the polymer unexpectedly during experiments with catalysts while trying to convert the natural gas components ethylene and propylene into compounds useful for gasoline. Later, they also developed a new catalytic process for making high-density polyethylene. Phillips soon invested in new plastic manufacturing plants.

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Film Download - Interesting Facts :

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ARTICLE INFORMATION :

The article is dedicated to the description of such online service as movies watching and download. Read about the opportunities the Internet provides in relation to video downloads.

ARTICLE CONTENT :

Our life at present is quickly developing. Apart from regular everyday troubles we cannot get rid of stress that has a destructive impact on our health and mood. Stress is mostly connected with rapid speed of life. People are usually in a rush and they do not have time to relax. That is why having a hobby is so significant in order to stay in good state of mind. Sportive activity and cultural development hold the leading positions amongst the best ways of spending spare time. Music, books, theatre, cinema have become an integral part of a person's life as they help to develop intellectually.

Cinema takes a special position amidst other arts because it's a combination of music and artistic play, script creation and film production. Film is a piece of another reality. When you watch film you feel deep emotional connection with principal characters. You have an opportunity to distract from your own problems or thoughts and become totally absorbed in what you see on the screen. It helps you to keep your mind active and sympathizing.

Technological advance has gone far and has changed our life to an unbelievable extent. The creation of the World Wide Web has connected the planet into one single unit. We not only know what is going on in distant countries practically at once, but we have a chance to communicate with people, listen to music and view video films online, as well as download them. All you need is only a PC and an access to the Internet. The newest films and the old ones are at your disposal. Downloading films has a lot of advantages.

Amidst the most essential of them is saving your money and time on the search of the necessary DVD in the nearest movie stores. Moreover, downloading videos from the World Wide Web brings a lot of comfort. It's actually a home cinema with your own schedule. It is you who choose what video and when to watch. If you take a decision to download this or that film from the Internet you will easily find a number of websites providing their services. Take some time to choose the most appropriate one and enjoy viewing your favorite movies.

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