Dr. William Jensen explains “The Strange Blowpipe 19th Century Miners Used to Analyze Ore” in the Wired article at http://www.wired.com/2014/08/crazy-blowpipe-apparatus/#slide-id-1232521.
For more topics like these from the history of chemistry visit the Oesper Collections at http://digital.libraries.uc.edu/oesper/.
