Electrolytic rectification

Mr. Chairman, ladies and gentlemen, when I was first asked if I would make some remarks on a Wireless subject, I was deeply involved in another section of Wireless, and I did not think I could possibly manage it. But I thought it might be possible, without entering into any very great technicalities, to go into a somewhat useful and interesting subject to the ordinary experimenter — that is to say, the subject of electrolytic rectification with special reference to battery charging.