1. Rays of Positive Electricity and Their Application to Chemical Analyses;Thomson,1913
2. New Method of Positive Ray Analysis;Dempster;Phys. Rev.,1918
3. Positive Ray Analysis of Lithium and Magnesium;Dempster;Phys. Rev.,1921
4. Positive-Ray Analysis of Potassium, Calcium and Zinc;Dempster;Phys. Rev.,1922
5. New Method for Studying Ionising Potentials;Smyth;Proc. Roy. Soc. A,1922