New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-01-20

SIMS DISK WITH IEAhsii THUS tE>fhNED
UUr,r and dark Vcuu ron Hem OIL ere
swtr aid light image a. ron Sortleu uen'pLert.
But the case i very different vita those Observers
who employ Delisles method They require TO know
the absolute moment because observer IL as far
away possible the opposite side OF the earth from
the other. They oanuOt communicate, and therefore
the only they compare their time is by knowing
the time their station BIT in order 10 know the
true time 1t is necessary that the longitude should be
known. Suppose in England certain event happened
at o'clock in the afternoon then You will know il in
HewYOrk as earlier by We hours. Ii would certainly be
dicult 10 DC accurate within second Now in
order TO apply Deise's method the two observers
must know the true time OF their stations within
second two, and while this obstacle
sight be sUrmouuted in such places as
greenwich Washington Paris &C.. yet 10 wOu.d be very
difficult 10 do il iu desOate place or island on the
sarths surface; and that il the difficulty OF Delise's
method JIG Is very well worth noting that dunng
seasons Of observations made between Greenwich Paris
and Washington, tie Washington observers by making
comparison between those results. found the true
difference OF Longitude between Greenwich and Paris
American ASTRONOMERS the FIRST TO give the true
sMeiehee ci longitude between Paris and Greenwich
lou VIII houee what We have 10 do III these two
arc TWO very different things. Haleys - easy and the
ether il difficult
4h'L comes Tie history Of those matters by which the
sef'aohs OF The next two traneits have been deter
- al "N4Ni tuidtt mistake IN lb1I, repeated
""i ID I'os The Astronomer Royal Of England came to
'he CONCLUSION that Haley method could not applied
INC year 1914 aud he also the CONCLUSION that
eOuiu be applied 10 the transit OF 1852 Therefore
observations were 10 be made by that IN 1854
ana expeditions would have been prepared for that pur
bose when chaneed N looking over the arguments OF
'he Astronomer Royal TO discover that he had arrived
N'nS'us'oh thst was erroneous. found those state
meh's must be reversed; that IL IL i'm the transit M,
1907 mat the latter method be applied while ,bs
year Halleys method eau be employed with erea, Ger
IADv' msue the statements accordingly These mic.
tutet Indicate the potnt which my reasoninc ,ya
based Here re the earth seen from the sun q, ,ha
moment the transit begins Therefore al any ,l.os
now III view the beginning OF the transit mut be .s.n
Here ls picture showing The earth When the end f tho
transit Of ls7s can be Now, sou notice the begin
ming occurring here in North ASIA Japan AZ. The
end can also DC those regions SO that the be
snnius and end thus There is nothing to be
done hut 10 place observers those parts the earth
Abd they seeing the beginning aud the end. will know
INT line II takes Southern stations also exist you
hoe Tor seeing the whole transit Therefore, there is
Lothng TO prevent northern and southern observers
ron making those observations necessary TO Haev's
"e'h"s Tie northern observer will notice VEINS al
'he lowest OF those lines. while the southern watcher
VII zee The upperLD0st shortest OF those lines.
Atfythins they want 10 ready for them, and all
Si IL necessary L. that another observer should be
dt W this part Of the earth TO TINS more desolate
,esoh poinune 1t out on the diagram and then the
'Ioie thlng can be accom- lished
the transit OF 1852 there "a different state Of
"ss nett s Tie suriste " Tie ea'ib 81 iDs DeS,o-