INDEX SLIP. 
Euthbrfoed, E., aud McCltjng,' R. K. —Energy of Rontgen and 
Becquerel Rays, and Energy required to produce an Ion in Gases. 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
McClung, R. £., and Rftheefoeo, E. —Energy of Rontgen and 
Becquerel Rays, and Energy required to produce an Ion in Gases. 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
Becquerel Rays—radiation of energy from. 
Rutheefoed, E., and McClueg, R. K. 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
Fluorescent Screen—efficiency of. 
Rutheefoed, E., and McCltjs-g, R. £.' 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
Ions—energy of; distance apart in molecule. 
Rxjtheefoed, E., and McCetjng, R. K. 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
Rontgen Rays—heating effect of ; absorption in gases. 
RriHEEFOEi), E., and McCltjng, R. K. 
Phil. Trans., A, vol. 196, 1901, pp. 25-59. 
