First sketch of two possible Ariel designs from June 1962. In both cases, burning the outer heating mixture would heat up the inner part and liberate nicotine—either from a carrier or coated onto the walls of the tube. The smoker would inhale only the nicotine and not the burning heating mixture.

Source. Herbert Schachner and David Williamson, “Physical Chemical Aspects of Proposed Artificial Cigarettes.” June 1962, Bates no. 301120845-301120869.

Available at: https://www.industrydocumentslibrary.ucsf.edu/tobacco/docs/#id=fhmv0194 (accessed April 11, 2017), 12.