1. As has been stated earlier, Leduc obtained this effect by applying several separate excitations at intervals of from 30 to 60 seconds
2. I msec. = 0.001 seconds.
3. This is again a regular omission, which it is difficult to understand, and a point repeatedly raised in Hume's papers. No electrical engineer would dream of issuing a machine for, e.g., commercial use, and in which the magnitude of the current was of critical importance, without incorporating a meter. Nor is the component expensive.