u may have
noticed. Hurt it once on a lathe in my father's shop; never will be any
good for quick work."

"We will overcome that," said the instructor, "develop it."

"Also," declared the boy, "I have neither the time nor the inclination.
Must work and nothing much else. But I thank you, Professor."

"Sorry, my boy; you've certainly got a wicked right and you can use the
other."

"I'd want to use both," asserted Gus, laughing.

As for Bill, the hours each day and all of Saturday spent in the shop
sufficed for exercise; the rest was spent in study, brief eating and no
more sleep than he needed. And nearly every moment that could be spared
found both boys in their shop.

They had under way the construction of five radio receivers of the finer
type, for each of which they would get sixty dollars, the materials
costing about fifteen dollars. These receivers were equal to more than a
thousand miles, with strong, durable batteries and very wide
amplification. As with their first radio and the one for their good old
friend, Mr. Hooper, they made nearly all the parts themselves, even to
the switch arms, contacts, buzzer and binding posts, cutting all threads
with a fine set of standard taps and dies.

They also had two crystal sets to make, for which they charged twenty
dollars each, and made a profit of seventeen dollars over the cost of
the materials.

The most interesting was the making of four portable sets, with vacuum
tube detectors and loop aerials not over six inches in diameter, each
packed in small, neatly made wooden cases about the size of an ordinary
paper shoe box, the lids when opened forming the upright panels and the
loop aerials hinged to open out and upright. Being rather unique in
design, and satisfying fads for unusual construction, the boys felt they
should get at least fifty dollars for each of these sets, the materials
costing about twelve dollars.

Earning enough in this way to help them along very nicely with their
schooling, and being more deeply interested in their work than in
anything else, it was not surprising that Bill and Gus found little time
for play.

When they had finished one of the larger and two cheaper sets, that upon
installation at fraternity and boarding houses were found to work most
satisfactorily, the cash was quickly paid over. Bill divided it equally
and handed half to Gus.

"No, you don't, old fellow!" Gus demurred. "You get this and you can pay
me a sort of wage