New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1883-01-10

+ FIG. uI.-QUIESCEsT sUN-SPOf NECcHlI
As to the spo~. the centre is dark, but not uni
formy black. This Figure I'D is a picture made by
secch In sGl or 1868. Since then the improvements
IN telescopes enab Look down into The DARK holes
and although the spot l. dark there are darker spots
within. large eyes OF yoftce- Eehg Gown alpA,e! 81
little wells viii 81 cone between aud we may see some
tc artccs moving inwar1 and growing fainter. and
finally disappearing apparently going down out OF
sight You notice that there II no shading between the
central spo an the penumbrl but TIE line OF demarca-
ton sharp and clear When spot comes 10 ~ mii.
die age. 10 81 generally pretty nearly round sIOt IN
forming Ia very different IN appearance, ana 30
"a spot ia the stage OF dissolution When IL comes 10
the round shown here 10 viii 20 on Tor days
or even weeks with comparatively Little change. We
usually ind faculH around the spots. especially at the
edge 81 the disk You notice IN the diagram TINT
the fiamcnts are on the whole directed toward go
centre OF the sun. spot rs II appears when breaking
up, has no regularity about ~ 5ecchfs expression Is
that when spot aDOnt 10 disappear nc PotprpheIe
ap Jegrs t. fall pcl-mell into the centre OF activity
sgmeumes spots make their appearance ana qsappear
within twenty four hours or even In less time omitted
70 say moment ago tIat ON i9e large spSt ION the
80 thar inc Whbc caftn nlBht hhft Oocu
dropped into the centre OF activity leaving plenty or
In tni1 diagram you win the black central portion
and the penumbra surrounding H. aud viii observe the
changes Of form II travels ron the cdge the pcnuin
bra wider, until passes the centre. aud then
again IL becomes narrower. But When Il comes near
but only portion OF the peBumbra. I, Is precisely
II we were to take globe and make shallow cavity In
paint the shelving sides gray. When the globe was
turned that the edge OF the cavity would DE toward
Inc further side OF the gray portion That discovery was
made more than 100 years ago, by Wilson, Of Edn-
have succession o. osraPhs Of the cam, spot;
They taken or TWO days apart Each shows IL
little further from the sul. Who're the spot began
To break up, little bright bridge had formed
Further on VIC see II when TINS portion - Dfeakihg on
The portions y apart. and IN the last Of the pictures
when the spot had reached tho centre OF thb SUD- the
Wde these changes were going on the OF the
spot appeared to pass forward from the cast toward
the the West. We ind that tho. distance be.
tween the front OF the spot ana the rear
remains about the at nrst while the main por-
which we can compare with that produced when
wades through shallow water and leaves series o.
ripples behind hun. do not say that Is what taxes
place but Il IL II there something driving ahead
the portion OF the spot. In the augmentation Of
spot the portions 1y apart. Once IN whie We find
spots coae-cng but frequently the paris ny away
from each other. Sir william Herschel speaks OF the
breaking up of spot which he witnessed, aud 10
was as IL u piece OF ice thrown upon skating
pond the parts breaking aud yns asander very much
But do not think because the spot is days in
its passage mat these tllngs sse t.Eng place slowly
Tns large spot was very nearly 10000 miles long ana
the veOces OF the motions were, many OF them
thousand miles an hour We had 10 do, not with sOld
or "A liquid surface at all
some OF the different appearances Of the solar spots
are well illustrated 10y drawings by TrOuyeldt OF Har
ward College Observatory. In ther general appearance
they dcg somewhat from scccAis ngures, bat la tine
details there Is pretty close agreement There
SHOWN the notified surface Of the sun and pcnumlr
made up OF naments, IN The same way In this place
you peculiar bridge developing ITSELF Pictures OF
the spot taken Oh Marcn % ana 30 aud Apn !, .,
and 4, make it appear TO nave male nearly
only always tur an axis regularly the theory OF the
spots would be simple. NOOOay kuOgs what makes
those Spots. Ii is question whether they produced
by gases blowing up from underneath or by something
coming down from above but think the general i'm
preston IL that tue motion Ia the centre OF
spot downward toward the centre OF the and
upward from It, The darkness OF the spot only roa-
tive, for the backes! part OF Is brighter than cal
Cium light. There some pictures by Secch In winch
the sp1ts shoy the spiral formation. IL the theory
Of feye, ago. that the motion OF the spots
analogous that OF storms upon the earts surface
You know that the northern hemisphere the storms
circulate way the motion being contrary 10 that Of
the hands OF IA watch, and Ia the southern hemis.
pero they circulate the other way This effect Is pro-
duced by the earths rotation Feye Thought that the
SIMS rotation snade the equator move rapidly for
he thought e saw IL Ia the motion Of tno spots innca
tions OF vOriices the surface OF the But ~
were 80, all spots In the northern bemsphoT would
whirl The other way which unfortunately they DO not
do at ALL
OF Langleys earlier drawings of part of the solar
EDrIace represents the different appearances. AS
10 the granues, which make up the principal
part OF the solar surface he compares them 10 the
appearance OF a mans cOal-sleeYe covered with
fakes These granucs, which give nine tenths the
sunlight do OnofOnrlh OF the area. They are
from 800 TO 900 miles long and 100 200 miles wide
ana special form In tie spot itself the fine Ma
nents TO be bunt-ended, like tile tips OF peo-
pies fingers, but occasionally they take different forms
These generally speak OF rs the patch They
frequent y have spiral motion, but sometimes the
spiral turns I'm way and sometimes la the Other. The
view generally taken OF tue graDs and the view have