New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1872-02-23
NETWORK DAILY TRIBUNE. FRIDAY FEBRUARY 49, 1879
others ' '' N'' anu

Others ~
OBSERVATIONS IN SPAIN.
The general charge Of the observations in Spain was
assigned TO Prof. Joseph Winlock, Director OF Har
ward College Observatory. Cambridge, Mass. with
Assistant George W Dean OF the Survey Execu
tive officer The party OF II persons from the United
states was organized early in October 1870 Nearly all
were scientific Observers and had been engaged during
the total eclipse Ia August 1869. Two English and one
Is highly gratifying that, Notwithstanding the unfavora-
DE weather on the day OF the eclipse most OF the
SrHeIs were Inte successful Prof WinlOck, Capt. o.
H. Ernest OF the United states Engineers; Prof C. o.
ana several other members OF the expedition, sailed from
NewNOrk for Liverpool early IN November md reached
London about the middle of that month. Most OF the
hsIuments ana equipments were reshpped at Liver
poor lor Gibraltar, arriving at tn latter port
were forwarded by steam TO Cadiz. The geo
graphical position Of Jerez being favorable with
Prof. Winock decided mako the Necessary arrange
ments for observing the eclipse near that place The
the city in olive grove. on the 18Th OF December
the Instruments were IN position and good observations
for time and latitude made by Assistant aud
Capt Ernst assisted by Mr.. Henry Gannett Of Harvard
College Observatory These observations were repeated
on several favorable nights Immediately preceding the
day OF the eclipse at which date the latitude and local
time at the eclipse station had been well determined
competing the necessary arrangements for observing
the Jncnvena. The day preceding the eclipse was I'M
usually pleasant, pIi about midnight clouds began 10
with stormy wind from the southwest The prospects
for success on the morning of the 22d OF December
y
nued 70 perfect his arrangements, hoping that before
the beginning Of the eclipse the clouds would open and
observations 50 earnestly desired, These hopes
were in the main fealized. The time Of
few seconds later the photographer Of the expedition
obtained good photograph Of the sun. During the
OF tie eclipse, Oi them exhibiting very satisfactorily
the cmonal structure during t0aiitv. The equatorial
G TO- ' lee'' m OF - lleH'-' cIr'Igr
.Ua IN rTI EDt Npyf.F Hl...Nr
Photographic Telescope used by Mr. Gauuct mad q focal
length OF about So fest with aperture ut four inches
This telescope was firmly adjusted Ia horizontal posi-
ton, receiving the solar rays from movable hchO5at
near the objective. MIR. Gdnueu obtained tyc photo
observation Of clouds they not entirely satisfactory.
THE REsEALcHEs OF TIE srEcTROsCorE.
specroscOpc'obscr vaons upon the sun were made by
Prof Wmlock with two prisms attached to 5iinch
achromatc telescope. Prot Winock mad designed very
complete apparatus for recording the positions OF the
lines in the spectroscope rapidly the observer
could point upon them. with precision equal TO meas
urcments with m"rometer. Before leaving America
each pccrOScOpe for IN Spain was provided WITH
this apparatus which consisted essentially Of steel
point or Graver movable by micromctcr screw so that
exact po7ir9I u the lS Y9ud 1e recorded upon small
silver blade when tho observer pressed the graYeT ko
without dark lines OF the bright lines the most couspicu-
krchod l474, which IN all the spectre
sJOC, IHgCS C,i 90, o ~ ,br,oUcrf Ms il
high aud having a Te!ractins angle OF d degrees
seventh half prism follows, on the back Of which is
ccmcuted right auged prism, by which after two total
reflections light Is scu back through the upper part
of the train OF psms until 1t reaches the observing
telescope With this peCtroscopt attached to the Dart
mouth College Equatorial. having focal length cf nine
feet and aperture Of g. inches Prot Young was enabled
watch the oCCultatIOus of tie prutuueTauccs and
announce the approach OF the moon several seconds
before the first contact With the slit OF the spectre
scope placed tanCentay al the moment OF observation,
the field OF the instrument filed with bright mes
Mr. Pyc, young gentleman who assisted Prof Young,
saw this with a spectrOscopc 81 one prism.
Prof Langley OF Ale aheHy Penn, observed the sric
ture the with cd achrUmduc Of four inches
aperture and power Of about 100 He reports thar
the scrutiny OF the part nearest the nothing
but nearly uniform dlused light, except that
dark ray IN the field vas noticed to DO absolutely
straight and nearly rddal Tie outline or the corona
was roughly QuaGrangar. the larger diagonal making
angle OF nearly 40 degrees with the vertical Prof
Langley also used Sdyarts polarscope, winch was at
tached q small telescope OF u inches aperture During
totally the bands distinctly on the corona,
and were brightest where normal and tangent 70 IT, A.
the pOldriscOpc slowly rotated, marked change o!
Their brightness seen during the WhOc revolution
and they presented the appearance ana chardctescs
OF radia polarization Capt Ernst occupied an elevated
station, about mie and haH hortnWt7I u lne p n
general appearance of the corona and landscape curing
toality. Mr.. Gordon who resides IN the Nlcty Wa h
corona Prof Pickering OF Boston, also occupied we
last mentioned and excessively used an Arage
and obtained similar results WIN tttH' "Ii40N ~
tine radal polarization OF the corona ,.,.. !.
The icht covering the moons die was observer 10 uo
n0Iarize throughout the plane. ana the Ob'etSa
ION. shaved that the AragO and other polariscOpes e
dcut on color were sufficiently delicate 10 determine
mis- naue with accuracy MI Rose, at the same salon
used modification OF the buuseh - a., ,Iet
famed several accOTdant measurements sho" ing lht
tI Iicht WAS about equal TO th0t OF cdndc burning
AZ "a distance of two feet The eNpedIuoH VIZ 1"''0'S
full ana results OF great value have been oDtalueu