The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1878-07-28

The above da~
s c.. :s:;: Sst
line of ss"wngs should be ado; a. a. a. ceing the ont
sss and p. s.,n.
sSfe corona fade away gradually that will be
Indicated ss ssrr .sIaas ln.
s, as i os..1T S. d. DESIRES I'd
apon nohsr NJ sa" ", from memory It may be
few , rsa,sSn ,s OF the corona may probably be 70.
ing .ss"a, OF these portions
amer Ss'. .9"y are tn.
Visible H. before orr, ana after totaity. US INV '''
re corona Does It fade gradually array oe mas IL
The moons shadow should be bordsred BY dinrsc,ion
Sars Sna oossrvors claim have rs
%oaS be sIn moan after ,oy bay they
e.snsive landscape, and be a matter OF ine1es,
As the truth Of t.verrer's d,,eoy,r, of nm ANN.
now motion ~, Of the perheoa OF Mercury
the sesch Tor planet or piane,s VIII
s. S.r Of the espse near Tue should be
~. ANA anvthins hitherto unknown is discovered
Ss.wssa sse eye and tho giving the hour which
Inward The zenith The distance should 10 pvsn In
;n y s.s s Ss,% .eas, irs% n.ass rule
e."e is nSo, =. string should be tied to IT, "a which
rule BY holding hi; soes% ana Keeping 'ns
s IS At ,s pros1 dssnes from his hs has
B be used in as ss "ss II. :" s string
no ~ttenton need be paid any object more thar Nv. and
piegous a. distance aa hf imc Ds nns Mar.
Very o.a Of IL, '1 ssa and fourth con
,ses the difference between which is the duration of
ment requisite being watch havas Seconds had T5.
Them y Explained IN section o" tue method OF making
the form Of H. par, OF the sk t darkest during otsy
1t TO the brighter parts. WV s 'e' "oh
value probably be made WIN ysry scientific
ia. IL.
s, .e ".,sa win The TARGET aud longest tocusea POI,
Object most image s.s
sen''1 %, cp sreaa alas. e.t thai
Oh, n,SIes' p,epd with the sensitive chsmcas
The be ~ ,"S :. for %@sa.,s
" na MINNIE .in the predicca duration ,otaI.y az the
predicted aen eve s... Ss
DO bs ..e nna lei. .sa '., as be IN r.aaae
carr As ,he un w,Il ,. high ~ the heavens the Ordinary
!, na.,y some rousn eonuvance can DO made which will
A. many q the plates possible should he put in hols.
anu aa Seds tue >. ,ha they can be ud
va. when adjusted upon tue distant object
ma. the %sr. q tne centre Of The a1oand
glass he should insert plate and expose IT, The ground
he 'psS Sl, viii ' =. .s,s to s s.s
the eenrs Of the ID. s0rG ns,o h" ".gs s, away from
back s'.s which smother plate should
a Sy g" ~sn Se pilates can be a.ysOsd wh
posed three seconds the seconds three
seconds ana 80 on. alternately With portrait
ens tue exposures should be alternately
onds' ou ~ must be understood that not
10 1e USED IN any case Tue development carried
lar enough to bring out all the dctais; extreme care
aus n1. to pug. 50 far as 20 clog up tho deli
motion OF tue SAITH white the plate IL being exposed
mage o the sun.or rather OF the which
nn-wi be little blurred aud somewhat oval IN shaps
ma" N pon IT, mi " ys borne IL
oci that tncy can give but pictures mona
ne net usl slze IL Inches will be nearly rs follows
is with y lens 0oi; with . lens U07; With al
ems uu' and with an extra ~ eus, OLA. Tue
u the extreme outlying portions OF the corona may be
our or i've times these hgnres -
IL Is hoped that photographers making pictures In this
manner VIII send tue ongns negatives to the Naval |
Observatory; but. ~ they prefer to retain them II
Mnes'y requested that they will at least, send post
cientInc purposes zach pints mus, be scromns,,ed
- stasemsnt Of ~. kibd Of Ieus usei In It's |
reduction !; the focal distance aperture Of |
LAT lens the chemical process, employed In the dark
ovm' whether the bath ion the
late was exposed and the means Of Identifying IT'S ton
ne in'tet point 10 OF special importance the upper
de o. every plate must he carefully marked whsn 10
n1o ths hods beesuss Vie ehsaelef vi the corona such