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<center>'''"Share your knowledge. It's a way to achieve immortality."'''</center>
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<center>'''"Knowledge is the true organ of sight, not the eyes."'''</center>
<center>&mdash;From the [[Panchatantra|Panchatantra]] [http://www.britannica.com/EBchecked/topic/440899/Panchatantra (Indian literature)]</center>
<center>'''"The ink of the learned is equal in merit to the blood of the martyrs."'''</center>
<center>&mdash;Father Kristoforos, [http://www.randomhouse.com/catalog/display.pperl?isbn=9781400079322&view=rg ''Birds Without Wings''], by [http://www.contemporarywriters.com/authors/?p=auth2 Louis de Bernières (b. 1954)]</center> -->
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=== Draft of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> ===
[[Image:Johannes Diderik van der Waals photographic portrait.jpg|right|thumb|175px|{{Johannes Diderik van der Waals photographic portrait.jpg/credit}}<BR>Johannes Diderik van der Waals, most probably around 1910 when he was awarded the [[Nobel Prize]].]]
'''Johannes Diderik van der Waals''' ([[Leiden]], November 23, 1837 &ndash; [[Amsterdam]], March 8, 1923) was a [[Netherlands|Dutch]] [[theoretical physics|theoretical physicist]]. His name is primarily associated with the [[van der Waals equation]] of [[State (physics)|state]] that describes the behavior of [[gas]]es and their condensation to the [[liquid]] [[phase]]. His name is also associated with [[van der Waals forces]] (forces between stable [[molecule]]s),  with [[van der Waals molecule]]s (small molecular clusters bound by van der Waals forces), and with [[van der Waals radius|van der Waals radii]] (sizes of molecules). He became the first [[physics]] professor of the [[University of Amsterdam]] when it opened in 1877.


Johannes Diderik was the oldest of ten children born to Jacobus van der Waals and Elisabeth van den Berg. His father was a [[carpenter]] in the Dutch city of [[Leiden]]. As was usual for [[working class]] children in the 19<sup>th</sup> century, he did not go to the kind of secondary school that would have given him the right to enter university. Instead he went to a school of "advanced primary education", which he finished at the age of fifteen. He then became a teacher's apprentice in an elementary school. Between 1856 and 1861 he followed courses and gained the necessary qualifications to become a primary school teacher and head teacher.<font size=1>[[Johannes Diderik van der Waals/Draft|['''more...''']]]</font>


=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> ===
'''John Brock''' is a fictional British undercover agent created by [[Desmond Skirrow]].  He appeared in three fast-paced, witty, and irreverent spy novels written in the late 1960s.  Like his creator, he is a successful advertising executive in London; but he is also a part-time agent coerced to work from time to time for a secret department on the Addison Road run by the fat man.<ref>Although he is invariably referred to as the fat man, and is called He and Him by some of his underlings, in neither the British nor American editions is he ever capitalized as The Fat Man or the Fat Man.</ref>  Brock is tough, witty, combative, extremely competent, and supremely resilient. Even by fictional standards, he absorbs incredible amounts of physical damage at the hands of his adversaries before, after a few whiskeys and a few hours sleep, he is ready for his next fight against overwhelming odds and, quite likely, yet another beating.


==Cigarettes and sweet white wine==
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<h4 style="margin:0 0 0.75em; padding:0;"> '''Article counts''' </h4>
<p style="line-height:21px; padding-left:20px;">
[[:Category:Citable versions of articles|Citable Articles]] <font size=1>('''{{PAGESINCAT:Citable versions of articles}}''')</font><br />
[[:Category:Developed Articles|Developed Articles]] <font size=1>('''{{PAGESINCAT:Developed Articles}}''')</font><br />
[[:Category:Developing Articles|Developing Articles]] <font size=1>('''{{PAGESINCAT:Developing Articles}}''')</font><br />
[[:Category:Stub Articles|Stubs]] <font size=1>('''{{PAGESINCAT:Stub Articles}}''')</font><br />
<small>([[:Category:CZ Live|{{PAGESINCAT:CZ Live}} total articles]])</small>
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{{CZ:Quote}}
<br>


At the time of his first appearance in ''[[It Won't Get You Anywhere]]'', published in 1966, Brock is most likely in his early 40s, a large, tough, extremely strong man who had apparently served with British special forces in small boats during [[World War II]], probably with SIS ([[Secret Intelligence Service]]} or SOE ([[Special Operations Executive]]).<font size=1>[[John Brock|['''more...''']]]</font>  
{{-}}
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<h3 style="margin-top:0; padding-top:0.6em; border-top:1px dotted #e0e0e0;">
<big>[[CZ:Featured article|Featured Article]]: ''[[{{FeaturedArticleTitle}}]]''</big>  
</h3>
{{CZ:Featured article/Current}}
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<div style='text-align: right;'><small>''[[{{FeaturedArticleTitle}}|Continued]]...''</small></div>

Latest revision as of 19:28, 18 February 2024

Help Write Articles about our World

Welcome to Citizendium, a wiki for providing free knowledge where authors use their real names. We regard information as a public good and welcome anyone who wants to share their knowledge on virtually any subject. Our online community prides itself on being congenial and supportive. Read more about who we are.


See Recent Changes—an overview of articles being worked on now.

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Article counts

Citable Articles (145)
Developed Articles (1,147)
Developing Articles (8,088)
Stubs (8,029)
(17,529 total articles)

All good writing is swimming under water and holding your breath.
— F. Scott Fitzgerald (1896–1940), U.S. author. Letter (undated) to his daughter Frances Scott Fitzgerald. The Crack-Up, ed. Edmund Wilson (1945). Source.
       —add a quotation about knowledge or writing

Featured Article: Caterpillar Club/Citable Version

The Irvin pin. The eyes have always been red, but there are urban legends about the meanings of other colors.
A pin from another company, possibly Switlik or Standard Parachute. This style is common in catalogs and auctions of military memorabilia.

The Caterpillar Club is an informal association of people who have successfully used a parachute to bail out of a disabled aircraft. After authentication by the parachute maker, applicants receive a membership certificate and a distinctive lapel pin.

History

Before April 28, 1919 there was no way for a pilot to jump out of a plane and then to deploy a parachute. Parachutes were stored in a canister attached to the aircraft, and if the plane was spinning, the parachute could not deploy. Film industry stuntman Leslie Irvin developed a parachute that the pilot could deploy at will from a back pack using a ripcord. He joined the Army Air Corps parachute research team, and in April 1919 he successfully tested his design, though he broke his ankle during the test. Irvin was the first person to make a premeditated free fall jump from an airplane. He went on to form the Irving Airchute Company, which became a large supplier of parachutes. (A clerical error resulted in the addition of the "g" to Irvin and this was left in place until 1970, when the company was unified under the title Irvin Industries Incorporated.) The Irvin brand is now a part of Airborne Systems, a company with operations in Canada, the U.S. and the U.K.[1].

An early brochure [2] of the Irvin Parachute Company credits William O'Connor 24 August 1920 at McCook Field near Dayton, Ohio as the first person to be saved by an Irvin parachute, but this feat was unrecognised. On 20 October 1922 Lieutenant Harold R. Harris, chief of the McCook Field Flying Station, jumped from a disabled Loening W-2A monoplane fighter. Shortly after, two reporters from the Dayton Herald, realising that there would be more jumps in future, suggested that a club should be formed. 'Caterpillar Club' was suggested because the parachute canopy was made of silk, and because caterpillars have to climb out of their cocoons and fly away. Harris became the first member, and from that time forward any person who jumped from a disabled aircraft with a parachute became a member of the Caterpillar Club. Other famous members include General James Doolittle, Charles Lindbergh and (retired) astronaut John Glenn.

In 1922 Leslie Irvin agreed to give a gold pin to every person whose life was saved by one of his parachutes. By 1945 the number of members with the Irvin pins had grown to over 34,000. In addition to the Irvin Air Chute Company and its successors, other parachute manufacturers have also issued caterpillar pins for successful jumps. Irvin/Irving's successor, Airborne Systems Canada, still provides pins to people who made their jump long ago and are just now applying for membership. Another of these is Switlik Parachute Company, which though it no longer makes parachutes, still issues pins.

Footnotes