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    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.

    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.

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Website preview thumbnail for : HumTumLove
Provides a platform to share individual love stories, dating stories, getting expert opinions over love problems and sending love greeting cards. Send your loved one free greeting card related to l...
http://www.humtumlove.com
Website preview thumbnail for : Cards Direct
We have a wide range of good quality, low cost greeting cards from just 75p that will be delivered directly to your door. No order is too large or small. We are open 24 hours a day, 7 days a week f...
http://www.cardsdirectuk.co.uk
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Has wide range of online free Greeting Cards & Messages for all occasions. Spread the message of warmth and good cheer to your loved ones,family and friends with a choice of birthdays, anniversary,...
http://www.dgreetings.com

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A lots of free online games and other free games are available at kidztar. Therefore it is the best place for your kid's entertainment.
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Website preview thumbnail for : Vegas Horseback Riding
Horseback riding in Las Vegas. Choose from rides that include breakfast, lunch, or a sunset steak dinner. Overnight Las Vegas horseback tours also available.
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A directory of directories running the phpLD script. Site that we have worked on, or contain our mods or code can be upgraded for free.
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Website preview thumbnail for : Associated Transformers
Associated transformers is a leading Transformer Manufacturing Company in Tamilnadu, India. Lead the industry in manufacturing of various types of transformers like Distribution, Furnace/ Rectifier...
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Friendship poems happen to be just the best medium of expressing eternal friendship to that special friend. You can let all the love and affection you possess flow out, right onto the paper lying in front of you, through a sweet little friendship.
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Just a line to say I'm living, That I'm not among the dead Though I'm getting more forgetful And more mixed up in the head.

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