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imported>Pat Palmer
(providing direct access to workgroups)
imported>Pat Palmer
(changing table to go directly to "all articles" instead of Workgroup home page)
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{|style="width:90%; border: solid 1px #f0e6ed; background: #fff5d1; margin: 0 0 0 0; padding: 1px;"
|-  
|-  
| [[CZ:Agriculture_Workgroup|Agriculture]]
| [https://en.citizendium.org/wiki/Category:Agriculture_Workgroup Agriculture]
| [[CZ:Earth_Sciences_Workgroup|Earth Sciences]]  
| [https://en.citizendium.org/wiki/Category:Earth_Sciences_Workgroup Earth Sciences]  
| [[CZ:Journalism Workgroup|Journalism]]
| [https://en.citizendium.org/wiki/Category:Journalism_Workgroup Journalism]
| [[CZ:Physics Workgroup|Physics]]
| [https://en.citizendium.org/wiki/Category:Physics_Workgroup Physics]
|-  
|-  
| [[CZ:Anthropology Workgroup|Anthropology]]  
| [https://en.citizendium.org/wiki/Category:Anthropology_Workgroup Anthropology]  
| [[CZ:Economics Workgroup|Economics]]  
| [https://en.citizendium.org/wiki/Category:Economics_Workgroup Economics]  
| [[CZ:Law Workgroup|Law]]
| [https://en.citizendium.org/wiki/Category:Law_Workgroup Law]
| [[CZ:Politics Workgroup|Politics]]
| [https://en.citizendium.org/wiki/Category:Politics_Workgroup Politics]
|-  
|-  
| [[CZ:Archaeology Workgroup|Archaeology]]
| [https://en.citizendium.org/wiki/Category:Archaeology_Workgroup Archaeology]
| [[CZ:Education Workgroup|Education]]  
| [https://en.citizendium.org/wiki/Category:Education_Workgroup Education]  
| [[CZ:Library and Information Science Workgroup|Library & Info. Sci.]]
| [https://en.citizendium.org/wiki/Category:Library_and_Information_Science_Workgroup Library & Info. Sci.]
| [[CZ:Psychology Workgroup|Psychology]]
| [https://en.citizendium.org/wiki/Category:Psychology_Workgroup Psychology]
|-  
|-  
| [[CZ:Architecture Workgroup|Architecture]]  
| [https://en.citizendium.org/wiki/Category:Architecture_Workgroup Architecture]  
| [[CZ:Engineering Workgroup|Engineering]]
| [https://en.citizendium.org/wiki/Category:Engineering_Workgroup Engineering]
| [[CZ:Linguistics Workgroup|Linguistics]]
| [https://en.citizendium.org/wiki/Category:Linguistics_Workgroup Linguistics]
| [[CZ:Religion Workgroup|Religion]]
| [https://en.citizendium.org/wiki/Category:Religion_Workgroup Religion]
|-  
|-  
| [[CZ:Astronomy_Workgroup|Astronomy]]  
| [https://en.citizendium.org/wiki/Category:Astronomy_Workgroup Astronomy]  
| [[CZ:Food Science Workgroup|Food Science]]   
| [https://en.citizendium.org/wiki/Category:Food_Science_Workgroup Food Science]   
| [[CZ:Literature Workgroup|Literature]]
| [https://en.citizendium.org/wiki/Category:Literature_Workgroup Literature]
| [[CZ:Robotics Workgroup|Robotics]]
| [https://en.citizendium.org/wiki/Category:Robotics_Workgroup Robotics]
|-  
|-  
| [[CZ:Biology_Workgroup|Biology]]  
| [https://en.citizendium.org/wiki/Category:Biology_Workgroup Biology]  
| [[CZ:Games Workgroup|Games]]  
| [https://en.citizendium.org/wiki/Category:Games_Workgroup Games]  
| [[CZ:Mathematics_Workgroup|Mathematics]]
| [https://en.citizendium.org/wiki/Category:Mathematics_Workgroup Mathematics]
| [[CZ:Sociology Workgroup|Sociology]]  
| [https://en.citizendium.org/wiki/Category:Sociology_Workgroup Sociology]  
|-  
|-  
| [[CZ:Business Workgroup|Business]]  
| [https://en.citizendium.org/wiki/Category:Business_Workgroup Business]  
| [[CZ:Geography Workgroup|Geography]]
| [https://en.citizendium.org/wiki/Category:Geography_Workgroup Geography]
| [[CZ:Media Workgroup|Media]]
| [https://en.citizendium.org/wiki/Category:Media_Workgroup Media]
| [[CZ:Sports Workgroup|Sports]]
| [https://en.citizendium.org/wiki/Category:Sports_Workgroup Sports]
|-  
|-  
| [[CZ:Chemistry_Workgroup|Chemistry]]  
| [https://en.citizendium.org/wiki/Category:Chemistry_Workgroup Chemistry]  
| [[CZ:Health Sciences Workgroup|Health Sciences]]
| [https://en.citizendium.org/wiki/Category:Health_Sciences_Workgroup Health Sciences]
| [[CZ:Military Workgroup|Military]]
| [https://en.citizendium.org/wiki/Category:Military_Workgroup Military]
| [[CZ:Theater Workgroup|Theater]]
| [https://en.citizendium.org/wiki/Category:Theater_Workgroup Theater]
|-  
|-  
| [[CZ:Classics Workgroup|Classics]]
| [https://en.citizendium.org/wiki/Category:Classics_Workgroup Classics]
| [[CZ:History Workgroup|History]]   
| [https://en.citizendium.org/wiki/Category:History_Workgroup History]   
| [[CZ:Music Workgroup|Music]]
| [https://en.citizendium.org/wiki/Category:Music_Workgroup Music]
| [[CZ:Topic Informant Workgroup|Topic Informant]]
| [https://en.citizendium.org/wiki/Category:Topic_Informant_Workgroup Topic Informant]
|-  
|-  
| [[CZ:Computers Workgroup|Computers]]
| [https://en.citizendium.org/wiki/Category:Computers_Workgroup Computers]
| [[CZ:Hobbies Workgroup|Hobbies]]  
| [https://en.citizendium.org/wiki/Category:Hobbies_Workgroup Hobbies]  
| [[CZ:Philosophy Workgroup|Philosophy]]
| [https://en.citizendium.org/wiki/Category:Philosophy_Workgroup Philosophy]
| [[CZ:Visual Arts Workgroup|Visual Arts]]
| [https://en.citizendium.org/wiki/Category:Visual_Arts_Workgroup Visual Arts]
|}
|}
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Revision as of 07:30, 15 December 2020

Agriculture Earth Sciences Journalism Physics
Anthropology Economics Law Politics
Archaeology Education Library & Info. Sci. Psychology
Architecture Engineering Linguistics Religion
Astronomy Food Science Literature Robotics
Biology Games Mathematics Sociology
Business Geography Media Sports
Chemistry Health Sciences Military Theater
Classics History Music Topic Informant
Computers Hobbies Philosophy Visual Arts

Help Write Articles about our World

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Citable Articles (145)
Developed Articles (1,147)
(17,529 total articles)

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— John Cotton Dana (1856–1929), American librarian and museum director.
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Did You Know?

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