66
Wireless Telegraphy
miles, the wireless telephone has only been successfully used up to distances barely exceeding 20 miles, and those used in the U. S. Navy are only guaranteed to operate five miles.
It is particularly adapted for service between the vessels constituting fleets, and for use on ferry-boats, tugs, etc., in harbors.
However, the art is young, and no doubt the distance will be increased after we have obtained a better knowledge of the ether.
