Robert Kennedy DUNCAN (1868-1914), Canadian-American chemist; studied radioactivity with Pierre and Marie Curie. 3L.S., Washington September 1901-April 1902, to Henri Becquerel; 4pages in-8 and in-4, on the letterhead of the Chemical Laboratory, Washington & Jefferson College; 2 in English, the 2nd in French. He has received his two publications and mentions the article he is preparing with McClure and Phillips. - He asks for advice "on a meditated research. The study of radioactivity has led me to consider the physical basis of the sense of smell"; on this subject, he has read Professor Tyndall's research "in which he proves the power of absorption which odoriferous emanations have over radiant heat", as well as an article by Will. Ramsay suggesting "that it should be possible to obtain a spectrum from the absorption of heat by odoriferous emanations (heat absorption spectrum)"... - He solicits Becquerel's views on his article on radioactivity, to be published in Harper's Magazine...