290 Till': KVOHtTION 'I'llKOUY 



lint n('\(>r(lu'l(>sH (ilu> ,M|)iii(ll(' (.hr(>ii(lM ixmu'Ii'mIc into (Jio iiit(>rinr ol' 

 tlio mu'loiiH. Hill tho t'lirdiuoHomoH a.I\vi\yn ninj^'o tlu'mHolvt'H (Hiit(< 

 ri'f^ulnrly i" tho ' <MiuiU.oriiil piano' ol" (lio hiuiuIIh {D, (*f'</) ii. ih'ocohn 

 tlu' |>n>(•iH(^ nuH'liiuiiHiii nl' wliicli is \\y no niciuiM cltviirly nndiM'Htood, 

 and indci'd (Im \t\n.y of tli(< I'orcoH in tlio wlioin procoMM of nncl(>iir 

 divisiiiii iH Htill very iin|i(>rr(>cMy i'i^vciiKm! to onr intollij^'tMico. 



TlniM wo liavo now hoi'oro hh a. piiK", Hpiiuili^ hIimiiimI lif;Mn'(>, wliioli 

 takes only a riiint .stain, with tlu^ ' HUiiH ' (cn) at itw ' poloM," and in its 

 (Mpiiiiorial phuu^ tho loop- or fod-Hlwijioil, oi- Hpliorical chroinoHmnoN 

 ((7/i\x). 'rii(^ wholii i,s doHiti'iiMrtiMJ th(> 'karyokinotii',' tho ' tnitotic,' or 

 tho ' inu'loar diviHion hf;'nr(>.' 



Tho nioaninji; and inip(irtM.nco oT tluH, a|. (ii'Ht Hijj;lit, pn/./iinjj; (i^furo 

 will at onoo hoconio cloar I'roni wdwit I'oIIowh. It inM.y \ns ohHorv(>d 

 at this Hta^'o, il" not ov(»n lon^' bol'oiHt, llwirt oM(^h oi' Iho chroniniin roiJM 

 or loops lia.M H])lit nlonn; itH whol(< loiif^th liU(> a. lo;^' ol' wood, and that 

 tho split haJ\'oH ai'o Ix^o'inninir slowly and Iwirdly noticu^alily to iiiovo 

 away IVoni oarcli otlu^r, ono hall' towa.rdH oiu\ tho othor towaii'ilH th(> 

 otlu^r i)ol(\ ol' tim spindlo (I'^i^'. /' and A'). Dirocl-ly in front ol' tho 

 oon(,rosoni(* tlu^y nnd<(< a ludt, aiixl now th(» matorial I'or tho two 

 (lan;;htor- inu^loi is in its pi'opor phioo (/'', chru), Thoso d(«volop 

 (jnickly, (^a.oh chroinoHoino ^ronp sin'ronnding itHoll' with a ihioNmm' 

 nmnilirano (l''i^'. (I) within wliioh tho chroinoHoinoH ^^radually lioooino 

 tra,iisi'orin(td an'a,in into a. nncloa.r notvvork. Within th(( ('hronia,tiii 

 subHtancu ])ropor this is Hc^atl/orod arliovit in Hinall ronndiHJi or angular 

 ^I'ranuloH, lyinjf oHpoc.iaJly at tho intoi'Moctiiifi; points ol' Iho notwovk. 

 It may lio statod a^t onc(\ tlion^'h tho I'nll Hignilican('(> ol' tho stn,l.oin(tiit 

 can (Hily ho a.pprooiat.i^d laXor, tha.t wo ma.y asHiiino with prohaJiility 

 that this l.)i'oakin^ np of tho ('hr(an(iN()inoH iN only Mr|ipar(int, and that 

 t]ios(! rods or HphiM'uH roaJly c^ontiniio to oxiHt in th(( nnol('n,r iK^twoi'k, 

 only in a dilI'or(!nl, I'orni, j^froaXly sproa-d out, Hoinowhat al'tor tho 

 inannor' ol' a, lUiizopod which str(tt(^hos out lino proooHHOH in all 

 directions. TiioHo )»r()COHH(iH lira.n(^h a.nd a.na«toni()so, ho tluit tho hoily, 

 wliic^h proviouHly Hooniod compac^t, now a.ppoars as a. lino notwork, 

 in point ol' I'act, it can bo dii'ootly oliHorvod thai tho chroinoHoitKW, 

 art(^r tlio nnol(Mis is ooiiiplotoly dividod iid:o two dauj^htor-mich^i, Hond 

 ont pointod i)r()c,oss(^s(A'a,nd C/) which t,n'a,diia.l]y incroaso in lonj^th and 

 bra,n(Oi, whilo Uio l)ody ol' tint c-hi'oniosonio itNoll' boconioH >,ti'a(hia,lly 

 HiiiaJh^r. Jt is thns prohablo thai, whon HUch a, daiijrhtor niK^loiiH 

 is <ai the. ])oint ol' dividinj^ anow, it may, by a, dra^wing toj^'otla^r ol' th(i 

 |)ro(M'ssoH or |)sondopodia ol' l;ho chromoHoinoH, pro(lnc,(t tlat Ha.nio rods 

 or HphoroH an thoso whioh proviouHly (.;a,vo riso to tho luttwork. Movo 

 (lofinito n^asons I'or this int()rprotaiion, will bo addiKtod lator on. In 



