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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RANDOM QUOTES
A Change is Gonna Come
by Meredith Grey
"...Change; we don't like it, we fear it, but we can't stop it from coming. We either adapt to change, or we get left behind. It hurts to grow, anybody who tells you it doesn't is lying. But here's the truth: Sometimes the more things change, the more they stay the same. And sometimes, oh, sometimes change is good. Sometimes change is everything...."
Until a man duplicates a blade of grass
by Earth Day, Thomas Alva Edison Inventor
"...Until a man duplicates a blade of grass, Nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favorable comparison with the products of Nature, the living cell of a plant, the final result of the rays of the sun, the mother of all life...."
RANDOM FACTS
More vehicles
about Stolen On New Year's
More vehicles are stolen on New Year's Day than any other holiday throughout the year. (So does that mean thieves are having their last fling before changing their ways or are they trying for a big score to start the New Year?)
Cancer Facts & Figures
about Besides Lung Cancer
Besides lung cancer, tobacco use also increases the risk for cancers of the mouth, lips, nasal cavity (nose) and sinuses, larynx (voice box), pharynx (throat), esophagus (swallowing tube), stomach, pancreas, kidney, bladder, uterus, cervix, colon/rectum, ovary (mucinous), and acute myeloid leukemia.
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Category Information : Cosmetic - Plastic Surgery
This is our Cosmetic - Plastic Surgery category. If you are interested in Cosmetic - Plastic Surgery, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
Is one of the truly gifted practitioners in the field of cosmetic surgery. Her reputation and results have attracted patients from throughout California and the rest of the country who desire cosme...
Plastic surgeon, Dr. Van Putten offers superior expertise and greatest value for Cayman Island Juvederm as well as surgery of the eyes, face, and neck.
We offer the latest advancements in surgery and every patient is given individual, customized consultations. Being completely educated about the truths in this complex industry, you as a patient are,.
We focus on providing specialized and individualized cosmetic dermatology procedures for patients of all ages. We offer laser skin procedures, dermatological surgery, Mohs skin cancer surgery, derm...
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To provide outstanding medical and aesthetic dermatology to people of all ages. We are committed to rendering effective, confidential and respectful care to all of our patients, in a warm and pleas...
The Los Angeles plastic surgeons at the Spalding institute on Spalding Drive in Los Angeles are the very best in the world. Learn more about our surgeries and plastic surgeons.
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 ...
Has grown into the largest supplier of live entertainment for weddings, corporate events and private parties in the UK. With over 90,000 previous customers and an artist roster of over 1750 bands, ...
Champagne hot air Balloon flights over Berkshire, Hampshire, Hertfordshire, Oxford, Surrey and London. The perfect surprise gift for that special occasion - Birthday Presents, Valentine Surprises, ...
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.
Search engine is the term with which we are accustomed with very much. But the web directory is not that same. The web directories are older than search engines according to the time of their invention.