Before bottled gas was delivered, chemists would make their carbon dioxide with a Kipp's Apparatus. Dr Samantha Tang (with Neil, of course) dusted off the one stored on Professor Poliakoff's window sill. REDDIT DISCUSSION: http://redd.it/2hbyqk 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 Thanks Andres Tretiakov for the bomb bag!