Lancaster daily intelligencer. [volume] (Lancaster, Pa.) 1864-1928, 1890-02-22

applied when obsssving Ne moon b p,anslA
and with which ~ made M tsust iutesvstint
discoveries, ranged from 20 10 80, 10 end go
times; although, whsn inGpscting the doa6oB
and treble llxed starr, and Tie more distant
nebule, be RrsQusutly applied the full capac-
ity Of hs instfAmsnt The law Of optics, THAI
On object becomes dim Ia proportion = IL h
magnlnsd, seemed, frvm IL disqualification
In this powerful teiaocpe, 10 form an In
superabls boundary 10 further discoveries In
euf solar system. Several ysan, however,
prior TO the death Of this venerable sstrou-
omer, he conceived u practicable 70 con-
seruct an improved seriss u pafaboiic and
spherical reascsufs, which, By unising al the
tnefitdrious points In the 0rsgorian and
Newtoniaa instruments, with the highly 10
tsrsstinB achrom.tic dispovsry b Doliand,
would, TO Z gfsat ucgfce, remove ths fcrmi-
dabs u6geruction. His plan evincsd The most
profound research IN optical science, and the
most dextsrous ingenuity in mechanical con-
trivance; but accumulAting in6rmities, and
eventually death, prevented its sxpsrimsntal
application. His son, tkS present Sir John
HerchSi, who had been nursed and Graded
In the observatory, and practical astrouo-
u,er from bis boyhood, was 70 fully convinced
Of the value OF the theory that he determined
upon testing il, at whatsvsr cost Within
two years Of his fathers death he com
pleted his new apparatus. and aaaptsd n to
the old telescope with nearly pstfect spccs@
He found that the magnifying power Of 6,O00
times, when applied 10 the moon, which was
the severest criterion that could Be selected,
produced, under these new roncctors, focal
object Of exquisite distinctne0, free from
every achromatic obscurity, and containing
the highest degree Of light which the great
The distancs beine 10000 milsa and the
maepifyinr mower 0.oD tmes. ths re.,lt 4, =
simple matter of diviuion c9lO. .f,m divider, hv
5000 EQUALS 40: objects on the moon could r.
seen a. clearly g st forty milee distancs d,
earth And hsru Il annanod that nature had
placed an eternal limit Hierins. Fontana.
Gregory, Newton. Dollaud and Herpcbel had
resorted 70 every ma terial for the comno.ition
of Ienses and ref1ectors. hut In vain. AT
length Sir John. in consultation with air
David Brevvter. suspsstssi that the nrim.rv
focal image might be conveved into : d.rf
apartment twbere no tube vould be nec.s-
sory to shut OF the lateral light. and tbere
received and acted upou bv subsidiarv re-
aectors It was an inspirationi
He next suerested a seriss of snacula "a
correct Alteration and a Anal illuminated
microscope. Sir David snrano fron, ~.
rhate In ~ ~ ~ ~,
inc .Thou art ths r.rm IA, .r,hu.;.s,v,
-e,,. =, o., - ~ ,.i;a. -. .s ..s.'
t,m,o,o1v ~ ~ ,,,,,,, ,,,,1.. r.s s.,'a;'x ~.
in,ects might ho .een .. th.v 5000 Tho
DuLa Of sn...r the our,scsnt nstron ., sci.
ence and the arts. At once contributed e1C, ON
His aiestv Rino William ~, .,k.a ~ ,ha
measure yvoyid aid IN ~. ;r,nrovsr,.nt -
navigat,on ana hoirg .-u-.i th., i, ,-o,,,d
AZ once ousr.ntoed from, the naval f,,nj the
pesdad g7O 00O rAr .xtrsm.,v sis,,or.,o
and ,c,entifc rsnort NJ the co,str,ctio,, ~
the n.eIed instrnments and the;r trsr.,S,-,..
tion IN the C.ne IL omitted Aiso = mi a.
scription Of the locality ON a nl.taan and
the darkeped chamber In which the focal
image was first presented and then remaoni.
fled. so to sneak. upon An enormous canvas
At this point The Journal deems n neces.
sary to clearpes to follow the exact state.
ment OF DIR. Grant: On the night of Jan 10
the moon having advanced within four davs
of her mean lbratiop. Sir John ad diu,ted his
instruments for the inspection Of her eastern
limb The whole immense nower Of his tele-
scope was applied. and to its focal image
about one-baif OF the powcr of his micro.cone
On removing the screen of the latter the f,eld
of view was covered throughout its entire
area with n beautifully distinct and evan
vivid Representation Of basaltic rock. Its
color was a greeuish brown and the width of
the columns as defined by their interstices on
the canvas. was invariably twenty eight
inches No fracture whatever appeared in
the mass first presented, but in a few seconds
q shelving pile appeared of five or six col
umns width, which showed their figure to be
hexagoual, and their articulations similar to
those of the basaltic formation at StafYa
This precipitous shelf was profussly covered