Two-Hatters (fire department term?)

[Bapopik at AOL.COM]

TWO HATTERS
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"Two hatters" was recently used on NY1 News. Is it a fire department term?  
New York? I don't have my databases available here.
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(GOOGLE NEWS)
_Fire Union President Tells Members Not To Volunteer In  Firehouses_ 
(http://www.ny1.com/ny1/content/index.jsp?stid=1&aid=52615) 
NY1, NY -  <NOBR>14 hour
... He says those so-called  "two-hatters" could jeopardize union health 
benefits if they are  sick or injured on their volunteer jobs. ... 
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(GOOGLE)
_Fire Chief: FIRE Act Backs  Two-Hatters_ 
(http://www.findarticles.com/p/articles/mi_m0HEI/is_5_48/ai_n6019370)      Full text of the article, 'FIRE Act 
Backs  Two-Hatters' from Fire Chief, a publication in the  field of Health & 
Fitness, is provided free of charge by  ...
www.findarticles.com/p/articles/  mi_m0HEI/is_5_48/ai_n6019370 - 23k - 
_Cached_ 
(http://64.233.161.104/search?q=cache:WeG9hW1WPMwJ:www.findarticles.com/p/articles/mi_m0HEI/is_5_48/ai_n6019370+"two+hatters"&hl=en&ie=UTF-8)  - _Similar 
pages_ 
(http://www.google.com/search?hl=en&lr=&ie=UTF-8&q=related:www.findarticles.com/p/articles/mi_m0HEI/is_5_48/ai_n6019370) 
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OT: NO ONE CAN SPELL "BARRY POPIK"
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Popik. Five letters. No one can spell it!
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TODAY'S EXAMPLE ONE:
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_http://aguyinnewyork.com/archives/2005/08/big_apple_blog.php_ 
(http://aguyinnewyork.com/archives/2005/08/big_apple_blog.php) 
 
If you made it all the way down here ... do you know why New York City is  
called the Big Apple? Here are explanations from ... _The Society for New York  
City History_ (http://salwen.com/apple.html)  (entertaining, but a hoax - see 
_this_ 
(http://www.barrypopik.com/article/678/betsy-gotbaum-and-the-fictional-big-apple-whores) ) ... _wikipedia _ (http://en.wikipedia.org/wiki/Big_Apple) 
... _New York Public Library_ (http://
www.nypl.org/research/chss/faq.html#apple)  ... _Barry Popick_ (http://www.barrypopik.com/)   ...  
Posted August 7, 2005 01:01 AM  ·  _Permalink_ 
(http://aguyinnewyork.com/archives/2005/08/big_apple_blog.php)    ·  _Big Apple Blog Carnival (BABC)_ 
(http://aguyinnewyork.com/archives/nyc_blogs/big_apple_blog_carnival_babc/index.php) 
 , _Big Apple Blog Festival_ 
(http://aguyinnewyork.com/archives/big_apple_blog_festival/index.php)  , _NYC blogs_ 
(http://aguyinnewyork.com/archives/nyc_blogs/index.php)  
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TODAY'S EXAMPLE TWO (from the guy I'm PAYING):
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http://www.theroswellgroup.com/all_projects/BARRY/