The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1885-1921, 1892-03-03

which observations Vi CIlS CAo'37 60 pl
low brought, may be judged from the tn
act that although the obserValo[le9 ~,
If Waikiki are only about thirty feet T.
anart. this distance has very percep- l
tibIe effect on the result, and the op- b.
snrvations continually show differ "
nnce of lust this amount in the deter =
mined ATTITUDES. However, tor q
study of the law Of change of latitude, I
this ia of no moment, for whatever v
the relative position of the points OF \
observation they both change equally
and verify the same law. The metnoo
EMPLOYED, which is known as that OF
equal zenith distances, was hrst practl-
cally developed in the United States
Coast Survey and is now anniversary
adopted in work OF this klnd. w.,
When the government at WASH.
inoton was asked to cooperate IN the
Honolulu observations, IL was seen
| that the occasion would be favor
| ohIe one for the study of several
| tindred subjects and the American
representative in addition to the inter-
| national latitude work was cnarged
with researches in gravity, magne-
tism, meteorology, etc. one OF Tue
| theories proposed to explain the
changes of latitude was that OF trans
fers Of large masses OF molten lilaIIeI
in the earth's interior. In ofuer W
test this it was decided 10 measure Clie
force of gravity every nlght tlaG laCi-
| tude observations are mace, anu I!llS
, | is now being done at Walkikl MN
on accuracy capable of detecting
; changes no greater than the one hum
dred fhousandth part of the quantity
5 measured. Practically stated we may
g saw that a body falling towards the
earth masses over about sixteen teeC
i'm one second; if from some unknown
d cause the force of gravity shoulu
s change so as to increase this distance
L Nv only one-fiye hundredth of an men,
. this slight increase would be easily
detected by the methods employed.
u no arrive at these results 1t is neces-
IS sary to have very accurate means %
le measuring time. This is done oy re-
i ferring all comparisons to the move
ment of the stars whose passage
E. across the meridian are registered
er electrically on a revolving cSllilu uta
pr hutton is pressed when the sta
- crosses a spider-thread stretched yer
0' ticaIIv through the field of the teles
as cope, and instantly the fact is regis
he tered on the chronOgraph. The eXac
h. moment of transit can easily o
-. known to within one-hundredth OF
~ second. During the entire evening
Lte PENDULUM is allowed to oscillate undt
the influence of the force OF gravity
Ise Means are used by which the duri
hy ton of one vibration may be know
~ with no greater error tnan re
ei- millionths of q second. Inc CRAWL
IS Investigations are maze LOT Che sal
i've of discovering whether there is al
~ chance in the force from day to da
'h0 and not for the purpose of KNOWN
nat what the actual force is; in oth
is words, the question is not how raj
a bodv will fail in a second, but Wheth
ba- it falls faster at one time than
bIo another. .,
ole The methods followed are similar
1t those emDloyed on Haleakala in lS
llly which gave such conclusive eV1deI
40 i'm regard to the formation OF MAJ
80 and which bore out Prof. Danas e
ser logical theories. The same operatlc
In will be conducted next summer
tied | Mauna Kea, and will throw hghC
was it's density and internal structu
""9 This way of weighing the mounta
lo0- has been employed many times ~
me. cent wears. During the last cruise
the the Il. s. S. Pensacola to Africa,
od vpstipations were made on many
'"ilo the islands of the Atlantic, VIII
ons, gave the interesting result that Il
off Are all comparatively light.
ctric same instruments that were useI
.oll's the African w e, foo Te and We're Sen
the South Seas with the Y. >. -
cunt Eclipse Expedition in 1883, SO TN
kiki, fair portion of the earths surface ,a0at
o,, If been studied by the same met
y - which adds much to the strength
the result. ~
going The present operations will
n for this fall but the complete discus
haus- of the observations Will require p
lrth's ably year more so that the 9e
Il re- tive results will not be known be
emit of the latter part of 1898.
'er . The observatories referred t.
les in Mr.. Preston were those Of Be
f the Pottsdam, Strasburg and FRA
make It was at Berlin where DIR.
pPf tstee cuse was working in 1889 and
in the that he observed the first conn
obser- periodic variation in latl
ID the which was confirmed by obsel
:. oio re at the other cities named.
s we From these observations it
made lows that there was varlatlt
It. latitude in middle Europe.
&c tbsf task then was to ascertain VIII
ut fifty this held all over the eartl
nan we whether the variations in Ri
change were due to the operation OF
y. alG IeoI6 local cause. The Central b
70 nearly rI of the International Geodetic
his an citation therefore decided, IN
be rea- of these facts, to send an e2
) Sec cf at ton to Honolulu which is a
= u '' exactly 1902 from Berlin, to
ions on simultaneous observations
" oppo- those in Berlin. From thes
n naua ata servations the true cause
in Eu- variation could be ascertalne'
strong This result has been attain
lemon is point of fact. DR.. Marcus
F o4sants suits are nearly completely v
: surface. out and forwarded to Berlin.
seems to establish the fact that the p
ed from of the axis of the earth Oh
20 in oh producing a periodic motion
a q Ii list of poles. A change in latitud
are very ally took place in Honolulu
lg given, last May until about Sept
S ore t innc Since that time it has prac
d whose ceased, showing that the NIX
+boroforo - oo,c4oo+ This one fac