inconceivable that large charges such as are dealt with in commercial applications of electricity can be built up in an essentially different way from that in which the small charges whose electrons we are able to count are found to be. Furthermore, since it has been definitely proved that an electrical current is nothing but the motion of an electrical charge over or through a conductor, it is evident that the experiments under consideration furnish not only the most direct and convincing of evidence that all electrical charges are built up out of these very units which we have been dealing with as individuals in these experiments, but that all electrical currents consist merely in the transport of these electrons through the conducting bodies. In order to show the beauty and precision with which these multiple relationships stand out in all experiments of this kind, a table corresponding to much more precise measurements than those given heretofore is here introduced (Table VI). The time of fall and rise shown in the first and second columns were taken with a Hipp chronoscope reading to one-thousandth of a second. The third column gives the reciprocals of these times. These are used in place of the velocities in the field, since distance of fall and rise is always the same. The fourth column gives the successive changes in speed due to the capture of ions. These also are expressed merely [Pg 75] as time reciprocals. For reasons which will be explained in the next section, each one of these changes may correspond to the capture of not merely one but of several distinct ions. TABLE VI Sec. Sec. 11.848 80.708 .01236} .09655 18 .005366 11.890 22.366} .03234 6 11.908 22.390} .04470} .12887 24 .005371 11.904 22.368} .03751 7 .005358 11.882 140.565} .007192} 0.09138 17 .005375 11.906 79.600} .01254} .005348 1 .005348 4.09673 18 .005374 11.838 34.748} 0.01616 3 .005387 11.816 34.762} .02870} .011289 21 .005376 11.776 34.846} 11.840 29.286} .11833 22 .05379 11.904 29.236} .03414} 0.26872 5 .005375 11.870 137.308 .007268} .09146 17 .05380 11.952 34.638 .02884} .021572 4 .005393 .11303 21 .005382