The author of a previous letter replies to Vogelezang.

After having received three responses to my letter (contending an increase in conductivity when diluting a weak acid), all contradicting my conclusion, I endeavoured to perform the demonstration again. More attention to detail and variable controlling did in fact show that there was no increase in illumination of the light-bulb apparatus. If the electrode height in the solution is not strictly controlled, the illumination does appear to alter.

I thank those who wrote me with their concerns and data, and appreciate being set straight on this concept. Never to old to learn…

See also the author Matsumoto's reply and the Editor's Note.