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/

What is OCR?

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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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