The evening world., 1916-09-14

kennedy. half an hour
later, after We had met he student
from tho laboratory. Il have ar.
rsngod that We can get In there and
wait In one u The empty suites"
Kennedy had secured two rsther
good. sired boxes from the student,
was carrying them very careful
~, as II they contained some delicate
mechanism.
Warrington occupied . suite In a
large apartment on Seventy-second
street. and. A. We entered. Kennedy
stopped and whispered . few words
to the hallboy.
In the apartment he u~nwrapped ono
OF the packages. and laid II open on
the table. while he busted himself
opening the safe with the combina-
ton that Warrington had given him.
Here's the letter. just as Warning
ton left H." he reported. with some
satisfaction. banging tho door shut
and making the little safe look as
though no one had touched It.
Meanwhile I had been looking curl
ously at the box. 1t did o seem to
be like anything We had ever used
before. One end vas open. and the
lid lifted up on q pair OF hinges. l
lifted II and looked in. About half
way down the box from the open end
was q partition which looked almost
as II some one had taken the end Of
tho box and Just showed II in until It
reached the middle. The open half
was empty. but In the other half !
saw a sort Of plate Of some substance
covering the outside OF the shoved.tn
End. There was also . dry cell and
several arrangements for adjustments
which did not understand. Back OF
tho whole thing was q piece of mech
anism, O clockwork interrupter. - I
learned later. Wires led out from
the closed end Of tho box
Craig had showed the letter into his
pocket and had placed the box In .
corner, where It was hidden by a pile
Of books, vita the open end facing
the room In the direction Of the anti
quated safe. The wires from the box
were quickly disposed Of and dropped
out Of the window to the yard below.
where We could pick them up later. as
we had done with the detectaphone.
"You see." ne explained. there Is no
way Of knowing Just how the apart
ment will be entered. They appar-
entity have some way. which they
wouldn't discuss over the telephone.
But It Is certain that n long AZ they
know that any one 10 here they will
put OF tho attempt. My scheme u
for Us now to leave tho apartment
Internationally. think that - calcu-
lated 10 insure the burglary. for they
must have some one watching BY this
time. Then Va can get back to the
empty apartment on tho next street,
and we shall be prepared for them"
Kennedy stopped to speak to the
hallboy again as We left. carrying the
other box. After a turn down tho
street, a ride In a surface a for a
few blocks and back again. he was
satisfied that NO one was following,
and we made Dur way into tho va
cant apartment on Seventy-third
Street without being observed.
Picking UP tho wires from War
rington's. and running them across
the back fences and UP to tho vacant
apartment was accomplished easily.
In the darkness Of the vacant room
he uncovered and adjusted the other
box, connected one set OF wires to
those we had led In and another set
to an apparatus which looked pre-
cisely like the receiver Of q wireless
telegraph. fitting over the head with
an earpiece. He placed the ear-piece
In position and began regulating the
mechanism.
II didn't use the detectaphone." he
explained. because we haven't any
assurance that they'll talk. or. II they
do, that 1t will be worth while to lis
ten. But they certainly can't work
Without nBHt Oh soHie MINI LUIS 'h'
strument literally makes light audi
BILE. 1t was invented to assist the
blind, but | think I'll be able to show
that it can be used to assist Justice
which is blind sometimes. they say
1t is the optophone."
lie paused to adjust the thing more
accurately.
TT was invented" he resumed. by
Prof. Fourier d'Albe. a lecturer or
physics at the University Of Birming,
ham, England, and has been shown
before many learned societies owe
there. 1t actually enables the blind t
, locate many things purely by tn,
' ,Igb, raooctod IN, ,bam To-. ,otion 4