OCR Interpretation


The day book. (Chicago, Ill.) 1911-1917, February 15, 1913, Image 13

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

Persistent link: http://chroniclingamerica.loc.gov/lccn/sn83045487/1913-02-15/ed-1/seq-13/

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MACHINE TAKES AUTOGRAPH OF AN EARTHQUAKE
ion
,..'
Shaking needles on this machine tell scientists where an earthquake
occurs and how severe it is.
Measuring, mapping and rout
ing an earthquake has become a
very serious business during late
years and there have been a num
ber of instruments invented for
the purpose.
The measurements are made by
the earthquake itself causing deli
cately hung needles and weights
jto shake in different directions.
L At first there were'different in
struments to perform the differ
ent operations, but nowadays
they combine the work of meas
uring the number, the direction
and kind of- shakes so that the
average earthquake expert, by
looking over a few yards-of paper
tape spurting from the insides of
one of these machines, can tell
what kind of an earthquake has
occurred and ive some idea fif its

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