OCR Interpretation


The day book. (Chicago, Ill.) 1911-1917, December 21, 1911, Image 13

Image and text provided by University of Illinois at Urbana-Champaign Library, Urbana, IL

Persistent link: http://chroniclingamerica.loc.gov/lccn/sn83045487/1911-12-21/ed-1/seq-13/

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NEW MACHINE f 2SEGRAEHS Y.OXJR--HEART.BEATS AND
- -v,- ... .. v I . . .J-,.J - .w-' '
""- -- "
- ' The" New. Heart'
Ever test' .your qWn 'heart
beats? It's wor.th while to" take
your own pule' occasionally, no.te
if the beats are rtglilar and, at
proper speed. Normal, average
pulsation with adults is 'between
70 and 80 times, arninute. . ' ,
i But a ma'chine has'been invent-;
ed that do'es'far more than1 can
even the clever fingers of 'your
family physician onyoiir vrist. ,
'It notes even minute irregular-
ity of the heart, telegraphs it' au
tomatically to a magnifying and
recording 'instrument and the
result is a long tape on which
your-doctor -may- study youn
heart by its work almostus well
Tester in Action. .
-as if; he-had it on thev table in front
of him."
Human,- -heart beats generate
an electric current'- that can be
transmitted by; wire. The new
.instr-ument,;.based on- this.princi
ple, is in use ; att John; Hopkins
hospital, . Baltimore.- Electrodes
.are'attacheTd.'tP the .left" arm and
leg and ,tothe rightlarm of the
patie'ntand'connected yith a gal
vanometer ('current measure) of
extreme "delifca'cy:
A galvanometer ' consists of a
magnet through 'which ,the cur
rent flow.s. The. strength of the
current' is measured b)' its power
in defte'ctjng' the needle' of a com-
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