Gold Hill daily news. [volume] (Gold Hill, N.T. [Nev.]) 1863-1882, 1869-03-09
Interesting Experiments.

Some very interesting experiments
were mado last night by Mr.. Dean,
at tho Observatory, for tho purpose
Of measuring the time Of trans
| mission of Clock signals in
complex circuit Of 1000 miles. The
| object of those experiments was to de-
tcrmino tho correction which must be
applied to the t~elegraphic longitude
determinations which arc now being
made across the continent from Cam
bridge, Massachusetts,, to San Fran
cisco, California. In the arrangement
for the transmission Of tho Clock sig
nails from San Francisco to Cambridge
and return to San Francisco, giving the
instant Of sending the signal and re-
ceiving it, 10 Geographic %rcpoators were
required in ii circuits. As sooC as tho
Geographic circuit of yesterday ovon-
ing was completed between San Fran
cisco and Cambridge, 1.-The clocks ut San
Francisco, Salt Lake City and Cam
bridge wcrc connected in n Geographic
circuit. and clock signals were sent
from San Francisco to Cambridge and
returned for 10 minutes. These signals
wore recorded on the ~chronograph at
tho Observatory in Cambridge, on the
United States Coast Survey chrono-
graph at Salt Lake City, and also at
San Francisco
AS soon as that set of experiments
had been completed, the telegraph cir
cults were Joined ut Buffalo, New York;
and signals were sent from San Fran.
cisco for five minutes, but were not sue
cessfully recorded in Salt Lake City,
only for one minute. They were, how
ever, repeated twice and wcrc success
fully recorded, each time, for three min
utes. Then the circuits were Joined at
Chicago, and clock signals were sent
from San Francisco for five minutes,
and were correctly recorded upon the
| ~chronograph Mt Salt Lake City. The
circuits were next joined at Omaha, and
clock signals sent from San Francisco
for fvcminutcs, which were successfully
recorded in this city. Next the telegraph
| circuits were joined Mt Cheyenne, and
| signals were sent for five minutes which
were recorded with entire success. The
circuits were thon joined at Salt Lake
City, and clock signals from San Fran
cisco were successfully recorded. Ncxt
the circuits were joined at Virginia City,
Nevada, and the signals arc supposed
to have been well recorded at San Fran.
cisco. The record at Salt Lake City
terminated when the telegraph lines
were joined at Virginia City. Each time
that connections were changed, two re-
peaters were thrown out of the circuit.
Thus at Buffalo only eleven wero left in
circuit; when Joined at Chicago, but
nine were left; Mt Omaha seven were
left; at Cheyenne FIVE; at Salt Lake City
three; and at Virginia City one.
We arc informed that similar expert
mcnts were at tho same time repeated
by Professor J. Winlock, Director of
Harvard Observatory at Cambridge,
Mass, and the signals successfully re-
corded upon his ~chronograph with a
single pom, obtaining good results. This
is considered a great triumph in practi-
cal telegraphic science, and shows the
perfect organization of our present tele.
graphic companies, ms those experiments
could not have been successfully made
without tho most perfect organization
of tho telegraphic department. - Salt
Lake Ne,rS, March LIST.