THE 



AMERICAN NATURALIST 



Vol. LIII. March-April, 1919 No. 625 



AN EAELY PAPER ON MAIZE CROSSES 

 PROFESSOR HERBERT F. ROBERTS 



Tx tlie writorV ()])iiii()n tlie wl" \l.-{'mci-. t'iitit]«'d 



CI). Sliul! u) an.] \ >'i)i ^aril ;irtic!r^. Init n,ily 



Witll lorclrlU-.. to MrCllU'v'^ nl.MM\at-<.l,^ ..H til.- -ll-rvioV- 



it> (.1^ V h>l.rl(U in point .;t\x'u'M. a^ ^■niai .:nv.l with t!u-ir 

 ].aiciit^. Tl,o otluT iiialt.T of ucnctir iiit.'ic^i in llie 



I.crailM' of the uimv (.Meii-.Nr cai-lir,- ..NiXTiiMciiN { ^9- 

 !M) of K.-Il."nii;iii an<l Snx-moI,. ( [). ;n;.l tlu' ihoiv ini])or 



However, with iv^ncrt to f!,(. >u|MTior yirld of F, liy- 

 WuU. McClu.T^ y-Ayrv ('N,m.,mK in int. i tli.- more fro- 

 MiHMitly <,uolr.l oiu- of^InnoNN aii<l <iar.!iiri- in n-peet 



-PM-ialK in the I'art oi'tlu-Vf^'i^viix ot'liio F paiit^liav- 

 inu iMM.n IoIIowcmI out in tbo n icl-K of the V u.nrralion, 

 wliiclK in all luit a ^■vv^ ^e^^ .-aM-. n\,mv fnun.l Xu !„. ,]i^- 

 Tin<-tl> I,-, than the >irhN of tlu- \\ plants. Tlii^ ^..-.n^ 

 to have hern, historicallv >iH'al<iii- the lirM <lenion^l ra- 

 tio,, of the Infei-ioiitx in vicM of T, M-reuat.-. a^ .•0,11- 

 PiH-.Ml with tir>t ocnn-ation liyhi i.ls. Mc( 'inei-'^ cxperi- 

 ments Involved a wider raiiu'e of tvj.es of niai/e than did 

 IhoM" of M,.rrow and (JaidiiiT. and conipi-iM-d .Irnt. .wrct. 



