Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1907-06-29

breath from pair OF human lungs
is sufficient TO set the foundationp
swinging, thus making a record of os-
citation an actual earth wave yelling
UP from beneath, records itself In an
entirely different way. In short. the
earthquake makes its own signature on
the seismosraph, and no imitation or
forgery can escape detection. Every
earth tremor is compelled TO sign tho
record separately and distinctively,
Furthermore, surface tremors due to
local disturbances are not recorded. UNI
less OF exceptional intensity. AS al
ready observed while the illck Of a
kerchief ON the side of the massive
pier records a vibration of the pier,
hundreds of students running up and
down the stairways In the same build
ing practically fail to affect the record,
The artillery discharges at the nearby
army post-Fort Douglas-show
slight surface movement hut no earth
wave OF Importance.
INSTALLATION A SUCCESS.
The apparatus is in every way salts
factory; the installation is a success,
We cannot produce genuine earth
quakes AT the moment we would wish
to observe their effects; but 1t Is hoped
that within Il short time the seismo-
graph al the University of Utah will
be ready to receive and record any
earthwave traversing this region.
IL Is the intention 70 further test
The instrument by producing artificial
earthquake waves by firing explosives
NJ predetermined depths. The effect
Of earth surface waves so produced
can then be studied In detail.
IDEAL SITE.
The plncing of an earthquake re-
corder al the university Is OF signifc-
ance beyond the ordinary; It Is more
Than the acquisition of new ana
valuable piece of apparatus. The uni
Verslty campus Is virtually al the base
oil the Wasatch mountain range. A
great fault scarps forms the steep
western face OF this range, The Was
atch mountains are young they are
now rising with respect To the valley
floor on the west. The elevation of
the range Is accomplished by intermlt-
tent or spasmodic slips, such slips as
cause earth Jars, carth-tremors and
earthquakes,
The region westerly from Salt Lake
valley is region of nonocinal or
block mountain structures This per-
ssts In approximately parallel ridges
sist In approximately parallel ridges
westerly Ia the Slerras. AS these
crust blocks slip into positions OF
greater hthbllltN, earth waves are gen-
Grated aud such q wave once start
ed, Is propagated outward from its
place of oriRini Its arrival NJ any sur
face point is described as an earth
u"mor or earthquake at that point,
LIABLE TO EARTH WAVES.
IN Salt Lake City we are liable to
earth waves of two distinct kinds
those originating ln the up-slip of the
Wasntch mass and those started BY
the rcadjustment of the crust blocks
In the basin 10 the west
II VIII be generally conceded that the
accurate record OF these earth moye@
ments IL a matter of interest and im-
portance. as to this region II has
been repeatedly asserted that earth
quake disruption IL threatened, ana
that Salt Lake city IL IN danger
through seismic commissions. Promi-
nent among the prophets who predict
such dire calamity is Dr. Grove Karl
Gilbert. the eminent authority ON vest
ern geology. author OF the classic mano-
graph, Lake Bonneville and an
Investigator OF Worldwide fame. l in
corporate herewith certain statements
of mine presented 10 the Royal Scot.
tlsh Geographical society IN 1902. and
duly published, quoting pa ssases from
by Or. Gilbert and conn
msnts thereon (see scottish deograph-
nnl Magazine. September. 1900.