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TODAY IN HISTORY

    VACUUM TUBE
    October 20, 1906 - American Institute, U.S.A.

    Dr. Lee DeForest (26 Aug 1873 - 30 Jun 1961), one of the “fathers of radio,'' announced his three-element electrical vacuum tube (now known as a triode) to a meeting of the American Institute of Electrical Engineers He had discovered that when a mesh, or grid, of wire was placed between the filament and collector “plate” in a diode tube (first made by J. Ambrose Fleming, 1904), a large voltage-amplifying effect could be produced. DeForest patented this vacuum tube on 15 Jan 1907. The ability of this tube to amplifiy weak signals was an invention as great as radio itself, because it made long-distance communication possible.

    DIFFERENTIAL ANALYSER
    October 20, 1927 - U.S.A.

    A new electrical machine with a mechanical mind has been perfected at Massachusetts Institute of Technology / MIT by Professor Vannevar Bush which can solve problems to complex for human engineers. The Product a differential analyser allows the mathematician or engineer to feed in the equation and parts of the problem which cannot be solved by formal mathematics. The machine can take from 8 minutes to several hours to provide the answer which man alone can not solve today.

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  • Happiness
    by Thomas Jefferson

    "...Our greatest happiness does not depend on the condition of life in which chance has placed us, but is always the result of a good conscience, good health, occupation, and freedom in all just pursuits...."
  • The wealth of the nation
    by Earth Day, Gaylord Nelson

    "...The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity that'as all there is. That'as the whole economy. That'as where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world...."

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 : Greeting Cards

This is our Greeting Cards category. If you are interested in Greeting Cards, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
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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
Website preview thumbnail for : Dgreeting Cards
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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Website preview thumbnail for : Article And Link Dir
100% Search engine friendly Human Edited Article and Link Directory with Free and Paid Inclusions and Deep Links for Site Links and Articles. Submit your Site now.
http://www.articlenlinkdirectory.com
Website preview thumbnail for : Aviva Directory
A paid general website directory with everything from arts and literature to news, articles, and links about travel listed.
http://www.avivadirectory.com
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...
http://www.associatedtransformers.com
Website preview thumbnail for : Ferienwohnung Kluntjes Greetsiel
Komfortable Nichtraucher Ferienwohnung im Herzen vom schoenen Fischerdorf Greetsiel.
http://www.greetsiel-feriendomizil.de

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