The Washington herald. [volume] (Washington, D.C.) 1906-1939, 1915-07-18

had become now selt-conhdent neu
rasthenic
You know where tina, stuff will
land you. l presumed" questioned
Kennedy.
81 don't care" she laughed hol
lowly. They would kill me if they
knew | had come to you. Why have
|? Has not Haddon cast me off: What
is he to me, now'
1t was evident that she was grow
ing hysterical. wondered whether
after all, the story OF the kidnapping
Of Haddon might not be figment Of
her brain, simply an hallucination due
to the drug.
They" inquired Kennedy, observ
ing her narrowly. "Who?'
81 can't tell. I don't know. Why die
I come? Why did | come"
She was reaching again for tn,
snuffbox. but Kennedy restrained her
Miss Keith" he remarked, "yor
are concealing something from me
There is some one he paused mo
ment. whom you arc shielding
Lorraine Keith had torn hersel
from him. had instantly taken a pinch
OF the fatal crystals. with that same
ominous change from fear to self
confidence. What .had been her pur
pose in coming al all, 1t had seemed
at first to inIplicate Brodic, but sht
had been quick to shield him wher
she saw that danger. I wondered wha
the fascination might be- which tn,
wretch exercised over her.
Tonight will see you tonight,
hn Int h.
was gone, as Unexpectedly as she hat
come.
looked at Kennedy blankly.
Two hours later we had paid Z
deposit on an empty fiat in the tene
rnent house in which the bomb maker
had his headquarters, and had re,
ceived a key to the apartment from
the janitor. After considerable diff
ficulty, owing to the narrowncss Of
the air shalt. Kennedy managed &c
pick up the loose ends OF the wiz,
which had been led out of the little
window at the base of the shaft, and
had attached to it a couple of curiou:
arrangements which he had brought
with HIM One looked like a large
taximeter from motor cab; the other
was a diminutive gas meter, in looks
at least. Attached to them were sew.
cral bells and lights.
He had scarcely completed install
ing the thing. whatever it was. wher
a gentle tap at the door startled me
Kennedy nodded. and | opened it. II
was Carton.
81 have had my men watching the
Mayfair" he announced. There seem:
to be a general feeling of alarm there
now. They can't even find Lorraine
Keith. Brodie, apparently. has moi
shown up in his usual haunts since
the eposide of last night"
81 wonder If the long arm OF thi:
vice trust could have reached out and
gathered them in, too" | asked.
Quite likely" replied Carton, alb
sorbed in watching Kennedy. What:
this"
A little beA had tinkled sharply
and light had flashed up on the at
tachments to the apparatus.
Nothing. | was just testing it tc
see if it works. 1t does, although tn,
end which installed down below wa:
not this red light with the shrill bel
that we are interested in. 1t is The
green light and the low-toned bell
This is thermopile"
And what is a thermopile:" quer.
led Carton.
you probably have forgotten that
when two half-rings of dissimilar met
ais are joined together and one is
suddenly heated or chilled, there i:
produced at the opposite connecting
point feeble current which will flow
until the juncturcs are both at the
same temperature. You might cal
this thermo-electric thermometer
or tclethermometcr, or a microther.
momcter or any of dozen names.
Yes" | agreed mechanically, only
vaguely guessing at what he had ir
mind.
The accurate measurement of tenn
pcrature is still problem of consid
cradle difficulty" he resumed. adjust
ing the thermometer. "a heated mas:
can impart vibratory motion to tn.
other which fills space, and the wave
motions to the ether which fill
space, and the wave motions o.
ether are able to reproduce If
other bodies motions similar tc
those by which they are caused
At this end of the line | merely meas.
ure the elcctromotive force developed
by the difference in temperature o.
two similar thermo-electric functions
opposed. We call those functions ir
thermopile couples and by getting
the recording instruments sensitive
enough, we can measure one one
thousandth of degree.
"Iou see, down there | placed The
couples of the thermopile beneath tn.
electric furnace on the table. Here
have the mechanism operated BY the
feeble current from the thermopile
opening and closing switches, and &C
tuatins bells and lights. Then. too.
have the recording instrument. The
thing is fundamentally very simpl,
and is based on well-known phen
omena. 1t is not uncertain and car
be tested at any time, just as l die
then, when | showed a slight fall ir
temperature. OF course it is not the
slight changes l am after, not tn,
gradual but the sudden changes il
temperature"
81 see," said Carton. "If there is {
drop. the current goes one way anC
we see the red light; a rise and i
goes the other, and we see a greer
light"
Exactly" agreed Kennedy. ".Nc
one is going to approach that cham
Der down stairs as long as he think.
any one is watching. and we do moi
know, where they are watching. Blu
the moment any sudden greatschangt
is registered, such as turning on that