An introduction to astronomy: designed as a text-book for the use of students in college. By Denison Olmsted ...

catalogue for fltitre comparison.*' Of these), si$, are particllarly remarkable, viz., the comets of 168O,:0, n0 and:18,1-3;
andl thlose wllichl bcar the names of li allcy,- ],necke, and IBicla.
The comlllet of 10680 mwas distitlngishcd not only for its astonishing size anlt splendor, lut is rcmarklable for having been tlhe
first collct whose clcmenlts were (letcrJllined on tlhe sre ba'sis
of matheml;l atics, as was done by Sir Isaac Newton, it having
appeared in his time. The. comet of.1770 is. memorable for
Fig. 760. Fig. 77,
4~ ~ ~ ~ ~~ ~~::'"'': 4:'..q..........~%~....
~:,~ ~~i..........................'O. r 1811. COM":V O' 1(0.
the changes its obit h'as lundergone by the actlion of Jupiltcir,
and for h'avinfg apl)roached very near to tlhc earth. The comet
of 1843 wasr the most rcmarkable in its' appearance of all t.h:at
ltave been seen in modcrn timcs, lhaving been visible at noon(dty. I'alley's comnet (the sam wllhich ral)peared( il:18:35) is
distingtuslhcd as that whosc'return was first successfully pl'ediCtc(l ad itwhos orbit was first accur ately dete t lied; and
lcla's ad incke'l s omletvs are wtell tknown for tlcir short:icted and w.ose o.bit'Nla's.. irsr.a.ccul~-atel determined...a..
o See a comtflletc catalogue of coets, whose cltemecnts have becn detrminled,
in the Amtc-rian Alintnacfor 18r7,