| | |  Natural sample, 21% Pure. I collected this sample of naturally occurring air (21% pure oxygen) from about 20 feet away from the table in May, 2002.  The sound for this sample is a beautiful 78% nitrogen, 21% oxygen wind sound borrowed from ftp://ftp.zib.de/pub/UserHome/Luegger/Urania/Sound/FX-03.WAV .
 Source: Air
 Contributor: Theodore Gray
 Acquired: 18 May, 2002
 Price: $0/Free like the air we breathe
 Size: 2.5"
 Purity: 21%
 | 
 |   | 
 |