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Unread 07-06-2010, 04:04 PM   #4
Mister Bob
Babbling Farker

Join Date: 06-15-09
Location: Scituate, RI
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None whatsoever! The smoke ring is caused by the nitrates created by burning wood. This will even happen with a very clean burning fire with no visible smoke at all. A 'smoke' ring also can be artificially created using Morton's Tender Quick or some other tenderizer containing nitrates.
Mister Bob, Pitmaster - Bob's Hogs. KCBS CBJ #31759 - IMBAS Certified MOINK Baller

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