is all right when we use the ear pieces. But we got to thinking about a horn so that lots of people could e

r smiled

were still getting familiar with the working of the wireless, the crystal would do very well. But there comes a time to

any use in radio," put in Jimmy. "I never thought of i

te in one of his lamps. The plate didn't touch the filament, but formed part of a circuit of its own with a current indicator attached. Then when he turned on the light and the filament began to glow, the needle of the indicator began to twitch. Since the filament and

it hadn't been for the new theory of what electricity really is. That theory is that everything is electricity. This

held his hat rather gingerly at arm'

ed in the laugh

"Electricity won't hurt you as long as it's at rest. It's on

ooked r

lest thing that can be conceived, smaller even than the atom which used to be thought of as the unit. There may be millions, billio

That's the reason that the filament in

," suggested Joe. "If that is so, I should think th

he air stops them. Remember that the atoms of which the air is composed are so large that the poor li

tube and the electrons have nothing to stop them. That's why Mr. Edison saw the needle on the plate begin to move, although the plate wa

aused by the flow of electrons to the plate could be utilized for the telephone by the use of what he called an os

rful increase in the current that passed from the filament to the plate. Just as when you touch the trigger of a rifle you have a loud explosion, so the grid magnifies tremendously the sound that would otherwise be weak or only ordinary. And by adding one vacuum valve to another the sound can be still furth

tting my enthusiasm carry me away. It's hard to keep ca

more than we care to hear about it, you

's more interesting than a-a pira

some field of ice. Look at the Greeley expedition, when for months the men were freezing and starving to death. If they had had a radio outfit with them, they could have communicated with the outside world, told all about their plight, given the exact place they were in, and help would have gone to them at once. Not a man need have perished. So if a crew were shipwrecked on a desert island, they wouldn't to-day have to depend on a flag or bonfire to catch the attention of some ship that might just happen to be passing near the island. All they would have to do wo

l give you vastly more enjoyment in your work. I wouldn't have more than one at the start, but later on it may be well to have more. I have a catalogue up at my house of the various makes and prices, and if you'll run up there any time I'll give it to you. At the same time I'll show you just ho

ster's straight, alert figure a

the good?" aske

immy emphatically, the ot