Page:Über die Konstitution des Elektrons (1906).djvu/50

 of the measurements executed by with fast cathode rays. Maybe, by application of 's gleaming oxid-cathodes, it is possible to obtain sufficiently steady discharges also with even higher voltages than 38000 volt – the upper limit up to which came. Consequently it doesn't appear to be impossible to decide by which factor, $2/5$ or ½ or ⅓, one has to multiply the term depending on $$\beta^2$$, to achieve precise agreement with the observed variability of $$\epsilon/\mu_0$$. However, also in this case it is about the most attainable precision in measurement and calculation, and consequently about the expenditure of extraordinary means.