Distinguished chemist Jack Lewis passed away on July 17, 2014. As a member of the UK's House of Lords, he was Baron Lewis of Newnham. Nitrogen Tetroxide: http://youtu.be/JLCrZGgKD-k Rosetta: http://youtu.be/XEfKq-pQBcc More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingham: http://bit.ly/NottChem Periodic Videos films are by video journalist Brady Haran: http://www.bradyharan.com/ A run-down of Brady's channels: http://bit.ly/bradychannels