INTERESTING MARCONIGRAMS.

* There are all the ingredients for a very pretty quarrel in some correspondence begun in the latest London newspaper mail. Professor J. A. Fleming, of University College, London, the distinguished electrician, lectured on wireless telegraphy in the Royal Institute in London the other evening and illustrated bis addres* by means of wireless messages flashed to the lecture table by M. Marconi from Poldhu. Naturally these demonstrations excited great enthusiasm. The next day Professor Fleming wrote to the newspapers to say "that a deliberate attempt was made by some person outside to wreck the exhibition. I have evidence ' that it was the work of a skilled telegraphist. I feel certain that if the audience present at my lecture had knowa that in addition to the ordinary chances of failure in difficult lecture experiments, the display was carried through in. the teeth of a cowardly and concealed attempt to spoil the demonstration, there would have been a strong feeling of indignation." The following morning brought a sharp reply from, Nevil Maskelyne, th© well-known exposer of the notorious Devenport brothers and the author of "Modern Spiritualism," etc., who frankly admits his complicity in the interference complained of. He denies that any attempt was made to wreck the demonstration. On the contrary, he says, it warn permitted to proceed when, it would haw been easy to defeat it. He then writes :| — "We have been led! to believe ■ that Marconi messages are proof agaiast interference. Professor Fleming himself haa vouched for the reliability and efficacy of the Marconi syntony. No one can complain if we proceed to put those statements to the test. The very object of the interference was to elicit some such evidence as that which Professor Fleming has obligingly supplied. If all we had heard was true, he would never have known what was going on. Efforts at interference would have been efforts wasted., But when we come to actual facts, w« find that a simple untuned radiator upsets the 'tuned' Marconi receivers— an# Professor Fleming's letter proves it." Further developments will be awaited with interest.