Posted on 11/23/2013 8:47:19 AM PST by AdmSmith
Those were the days when you could demonstrate liquid nitrogen with your bare hands. Professor Julius Sumner Miller from 1969.
14 min https://www.youtube.com/watch?v=WNShaIM_OZ8
More here
https://www.youtube.com/playlist?list=PLCpgggEg1JgqTcRELKasY_IzU2jbRSiGy
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