( 501 ) 



(»r (lic liistop:ons. Tlmt in suinc sciccicd rools llicr(^ is some curi't^s- 

 |»(>ii<l('iicc. iii;ii<cs IK) (liH'ci'i'iicc. Tli.il in sIciKicr t()|»s Iniili np onl ol' 

 i-clalixclv ïrw . Icniilliw isc series of cells n rei;iil;ii- arrjini'-enieiil (ir<-e||s 



niav .M|i|»e;ii- as was dcsci-ihed aixnc, is tlic si iialiiral lliiii;^- in 



llic world. 10 iii\(' a parlicniar o\|)la.nali()ii of iliis is nniieccssai-x , 

 and in no case are lliese sinuie indicalictiis snrdcieiil lo cslaltlisli 

 sdleiv on llieiii a llicoi'v of liisloiieiis asllial of II wstkin. And xct 

 lliis would liaxc lo l)e done il' one wished lo adhere lo ihis iheorw 

 (or all oilier ('acis plead slroniilv a,Liains( il. ///y^y^/^y/.v. alniosi ihe nnh 

 plaiil show inii' a pleroine in Ihe slem, lias a sirncinre alloi>clli<'r 

 opposed lo ihe Iheory. And Ihe irre,unlarl_\ Iniill lops (oriii wilhoui 

 donl)l ihe o\'erpow (M'iiiii' uiajorilv. 



Il seenis lo me (luil hv llje inxesliualion of .Mr. ScnorTi', (he 

 ilis(oL:'en (heorv o(" Hanstkin is proNcd lo l»e erroneons. .V (•oiiclnsion 

 oC sonie\\ha( ,üeneral ini|)oi'lance eau slill he deduced Croin lliese 

 iii\es(ii>;i(ions. Manv l>olaiiis(s (hinl< llial lo ihe celldixision in 

 nierislenis a cci-lain plivloi>eiietit' iniiKji'lance innsl Ite uixcn, soinew lia( 

 ('()ni[>ariil)le lo ihal ot' llie •i.erniiiial lavers in /.ooIoun . i>n( hei-e is 

 f()r*»'()((e)i llial in /ooiouv in ihe liis(oi-v of dex-clopinenl folds and auaiii 

 folds are s|»oken of, lo a certMiii exleiil also hisloloüical dillert'iilialioii 

 is nieiilioiied. I»nl lillle or nodiinjz' of direclions of cell-dixisioii or of 

 ari-aii,ueinenls of o(liei-wise eidirely e(pii\alenl cells, if (he /,ooloi>is( 

 a((aiiis al heanlifnl resnlls hy ihe sdidy of ihe hisloi-y of dexclopinenl. 

 il in no\x ise ejisiies \'\-{)\]\ lliis llial Ihe sdidy of (he arran.Liciiienl of 

 ceils in ineris(eni.'^ will he ahie lo fni-insh (hese. iladier will (he 

 I»(»(anis( iiaxe (o e\|)ecl snch expianalions from (he sdidy of ihe 

 de\('lo|)men( of onler foi'ms, and of ijuier dilfereiilialions as a rcsiiil 

 of dillereiices in Ihe iiadire of cells. ivxperieiice lias lailU'lil ns ihal 

 Ihis e.\pec(a(ioii lias a i'i.uhl lo exisl. Uiil ihe i iislouen-dieory lias 

 ceriainly coiilrilmled lo nonrish ihe altoNc meiilione(l wroiiu' opinion. 

 Now llial Ihis lias heen pro\'e(| lo he incorrecl wc may expecl ihal ihe 

 hisloric and pliy loucnelic imporlance which has ofleii heen a'-criIxMl 

 (o liie dixisioiis ainl ai'raiiucnieiils of nondilfereiilialiMl and perfeclly 

 e(pii\aleid inerislemcells will he rednceil lo i(s riuhl and xcry sliiiiil 

 pi-()|)()r(ioii. 



( Ifoiiimirn, Jan. 21'. liMK5. 



