, 1922-06-16
spa su s.~dH.El

ing b set would clear things up, cs-
peciaily for those who are some dis
lance away from the sending stations.
They have weak signals To begin with
and must listen IN on very nearly the
proper tune II they are to get any
signals at all"
Il see.- nodded Dick. HFor that
purpose a wave meter IL needed IT'S
TO the radio what a pitch pipe Is to
a plano tuner"
Yes. Vim is simply a elaborated.
oscflating circuit and is one of the
simplest circuits to build" The pro-
~,fessor launched into a description OF
his small coil. variable condenser.
valvemeter phones. and general hook
up.
In town Ganick called up Mia
Walden at her apartments on Park
Avenue. She had got ahead of any
one else and had had Ruth's car
towod to c garage. They stopped
there a moment and Professor vario's
solicitude for Mrs Walden seemed to
offer Garrick the opportunity TO get
rid OF him. for they certainly did not
want any strangers about In what
they wcre going to do.
But h show" demonstrated Mrs.
Walden as Viro offered to stay and
do anything he cnuld to relieve her
Eanxiety.
"Iu telephone them hat I'm de-
tlayed- They can postpone my stunt
until later in tho evening" no in
Lsisted. "And. Mrs. Walden. don't you
worry when you have two such good
friends as Garrick and Dick helping.
You should have seen the way they
settled the porch crowd-and you N
count IN mo as a third. I may be the
last but I hopo not the least where
Miss Ruth's welfare is concerned"
Il really appreciate your kindness
deeply-but-of course. I want my
little girl. I can't think OF anything
else. I can't talk over tho telephone,
right; I can't read; I am just incapa-
citated until Ruth gets back to me"
''Dick, III stay with Mrs. Walden
for n little while. II I nay. I know
she needs some help II you want
me later III be at the Radio Show"
Garrick thanked him. then leaned
over Nita Walden "wen have some
word tonight-sure. By tomorrow
you'll have her back-safe."
Outside he found Mckay n de-.
livered Mrs. walden's instructions.
You are to take Professor vario down
to the Armory to the Radio Show;
| then you may put the al up"
Garrick had ben thinking out a plan
for the installing of the dictagraph.
Up the street from the Inner Circle
were two houses turned into studio
apartments. He found the caretaker
and the conversation was lucrative to
her.
Dick selected and carried up to the
roof the apparatus and they went as
silently as possible across the inter
vening roofs until they came to the
roof of tho Inner Circle.
IT was a curious roof. In the cen
ter had been built a great concrete
box as big as a room. There was no
time to investigate that. however.
Garrick fished with a inc down
the chimney. by sounding, until he To-
the flue to the Pink Room.
Then, dangling down. he lowered the
dictagraoh transmitter until 1t must
lhave hing a foot from the floor of
the hearth back of the iron grill work
under the mantel below in the Pink
Room. /
Meanwhile. on the roof, Dick had
been busy placing his sending set and
.oarrick helped him complete the set
rup.
As they left the studio house. two
men were passing. One of them
brushed ~suspiciously against Dick
with enough force to knock the bag
.he was carrying out OF his hand.
Garrick controlled bis temper. Here
suvoro &ba r,rztoriot,a shadOwara again /
Were they emissaries of the gang7
: Garrick picked up the bag himself.
significantly at the man, and
remarked, well. see? Nothing drip
pingr'
AS they had been at work on the
they had determined on placing
apartment which was only several
blocks uptown
At Bachelors Hall Dick worked
rapidly. for it was now getting dark
in spite of the length of the days.
He unpacked the receiving end of his
wireless dictagraph in the room. then
portable aerial.
Carefully and deity he began to
tune up, now hi this second install
IaIlOn was COtlplcle II was IdlicI
difficult L get the fine adjustment.
but at last he got the right wave
length.
he looked up at Garrick, smiled.
and took the headgear off, handing
it to him. Get that?"
Garrick adjusted it. listened for a
in some perplexity, then ex
claimed, why, I a hear the whirr
of a vacuum cleaner in the room!'
Dick smiled proudly. ct think I've
made the transmitter about as sensi
a ~rnicrophone as can b made. I
only hope IT isn't 50 sensitive hat it
picks up through the wall what hap
pens in the house next door"
They listened in for several minutes
but there was nothing more yet.
Whoever was cleaning the room fin
ished and left.
The buzzer on Garick's door
sounded. He opened It on a crack 1t
Mckay