WIRELESS COMMUNICATION REVEALED

I EARS ago a fanciful l writer took his readers 1 on an expedition to the north pole. The ex 1 plorer had been pre ceded to the region of perpetual ice by a party that had perished there. The hero of the story learned this one day when a torch that he was holding thawed. To strip wireless of its technicali ties and boil it down to the primal constituents is not hrd said an ex pert who has made a study of the theory and knows the practice.

It is simply transference through space of waves of electromagnetic energy. When a wireless operator presse a key a spark jumps between two pieces of metal. These two pieces of metal are connected with long wirea called antennae that are strung od poles called aerials. The energy from this spark is spread on these wirea _t j ll part of a large shaft of ice and there came from this icy pris on the voices of the men who had perished there years before.

Today the fancy of the novelist has become a fact of science. The air is filled with messages that may be heard by any one who.