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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 : Azure Day Spa
For over 20 years, GlyMed Plus has been a renowned leader in the skin care industry, offering a complete range of Professional Only products, combining technologically advanced ingredients with cer...
http://azuredayspa.net
Website preview thumbnail for : Arctic Spas Utah
My name is Christian Staples and I am the owner of Arctic Spas Utah. Unlike many other spa companies, I am an onsite owner. I am at the store everyday here to help you. We also have a great team to...
http://www.arcticspasutah.com
Website preview thumbnail for : Canyon Falls Day Spa
Canyon Falls Spa and Salon Scottsdale offers hair extensions, wigs, Remi Hair and hair extension installation, and salon and spa services including color, highlights, facials, massage, and nails.
http://www.canyonfalls.com

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A group of people with the same desire to help rescue and save small breed dogs from high-kill shelters throughout the united states and find them loving forever homes. We are always looking for vo...
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Hand Made Leather Dog Harnesses, Leather Dog Collars and Leather Dog Leads, our products are made from the finest bridal leather, all dog collars, dog leads and dog harnesses that we stock are made...
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As recruitment specialists, Bis Henderson work with businesses to successfully hire supply chain, logistics and procurement professionals on a permanent and interim basis across professional, manag...
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Carvers for Conservation was started to introduce the people conserving the habitat of migratory birds to the premier bird sculptors in the world. My intention was to be mutually beneficial to the ...
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