Ba Proceedings of Indiana Academy of Science. 
A KINETIC MODEL OF THE ELECTRON ATOM. 
R. R. RAMSEY, Indiana University. 
Modern theories of the structure of an atom assumes one or more 
electrons in motion in or about a central body or positive nucleus. 
Probably the experiment which has ‘been the most helpful in giving an 
idea as to the structure of an atom is the Mayer experiment of the 
floating needles. (Experiments with Floating and Suspended Magnets, 
Illustrating the Action of Atomic Forces, the Molecular Structure of 
Matter, Allotropy, Isomerism, and the Kinetic Theory of Gases. Alfred 
M. Mayer, Scientific American Supplement, Vol. 5, p. 2045, June 22, 
1872.) This, together with the work of J. J. Thomson, has become 
almost classic. (Phil. Mag., Vol. 7, p. 237, 1904.) The experiment 
gives an idea of the possible structure of atoms and may account for 
the periodic variations of the properties of the atoms. Thus one by 
assuming that an atom of large atomic weight has more electrons than 
one of small atomic weight, may account for the periodic table. The 
