| | |   Bottle of Homemade hydrogen. This is a very Martha Stewart sample: I made it from scratch with two batteries, two paper clips, and a cup of salt water.  (Sorry Martha, I did not use flavored sea-salt.)
 
 Making hydrogen gas is actually very easy, and you can read all about how to do it by clicking the story book icon for this sample.
 
 Source: Theodore Gray
 Contributor: Theodore Gray
 Acquired: 20 August, 2002
 Price: $0
 Size: 2.5"
 Purity: >90%
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