MATH’S NOTES

s in the case of last month’s column, we would like to revisit a topic that is, perhaps, not so esoteric but can easily be duplicated by anyone with a bit of effort. And yes, it does really work and if you try it, you will be amazed. You will also see that many experimenters, not just Mr. Marconi, were actively looking for a way to communicate without wires in the late 19th century. Incidentally the first part of this column is a good project with which to inspire a technically-oriented youngster, although the rest might be beyond simple experimentation. Who knows who might be