ere were eight that could talk direct. One is at
Funabashi, Japan; one at Carnarvon, Wales; two in France, one at
Nantes and one at Lyons; Rome, Italy, has one; Germany has one at
Nauen and one at Eilvese, Hanover; and Norway has one at Stavanger.
Then in Canada there are two transatlantic stations."

"Glace Bay!" piped the incorrigible Walter.

Bob patted his head with a mock fatherly gesture.

"Very good, son," said he, at which everybody laughed.

"These stations," he went on, "are all equipped with very high power,
varying in wave length anywhere from 17,600 to 6,000 meters. Most of
our stations are pretty powerful, anyway. Pearl Harbor, for instance,
has a 13,000 wave length; Cavite 12,000; Sayville, 11,600; Tuckerton,
owned by a French company, about 8,700; New Brunswick, New Jersey,
13,600; Marion, Massachusetts, 14,400; and Annapolis, 17,600. Only a
few foreign stations can match these in range. Carnarvon has two wave
lengths: 14,000 and 11,500; Lyons, 15,500; Nantes, 10,000; Rome,
11,500; Nauen, 12,550; Eilvese (Hanover), 15,000 and 9,600; and
Stavanger, Norway, 9,600. There are many, however, that vary from
7,000 to 4,000 and can transmit messages by relaying them."

"I wish my set could send farther," Dick murmured regretfully.

"It sends as far as the law allows. We must therefore abide by Uncle
Sam's judgment and be content. The scale is very carefully planned and
the classifications made most intelligently, I think. Amateurs are
limited to about a 200-meter wave length; low-power stations come next
and are grouped under 1,600 meters. Of these the 750 wave is reserved
for government stations such as radio compass stations, etc.; 600
meters is the commercial tune for large merchant ships; 476 that of
submarines, aircraft, and small war vessels; and 300 meters is the
commercial tune for small vessels. After that we pass into the higher
group, all of which come under the head of medium-power stations.
These range from 4,000 to 1,800 meters and first on the list are the
government ships which have continuous waves and a length of from
3,000 to 4,000 meters. Following them come the experimental and
miscellaneous stations with a 3,000 to 2,000-meter range; and after
them the 1,800-meter class which is the commercial tune for continuous
waves."

"And the high-power stations are the last, I suppose," put in Dick.

"Yes, those designed for trans-oceanic service. These range from
20,000 to 6,000 meters. The