NERIHsJ. 



TA.I* A 12. 



Chloral artirmU: 



.N tara. rmr. ear. BUJ 



-rr. rmr. loth. BttJ 

 dory of mvm 



N. ra rmr. cor. 0*4 . 

 .rr. rmr. foU- MJ 

 N. Story of .nu. 



N 

 N. 



N 



- rmr. eoc. Bttj . 

 rmr lotk. Ml 



N CWT. rmr. (OU. BMJ. 



N.dTof 



N* MITT* TB 

 N dry of 





. rmr. fath. Btmj 



N. 

 N 



rmr. foU. Bmj 



N Mm. Tmr. ear. Bimj 

 N. rarr. rmr. iota. BJ 

 N. dory of 



N. muv-rm 

 N crr n 

 N. dorr of 



N n>. rmr cor mmj 

 N. ewrr. rmr. (oU. mj.. 

 N dory of 



N. tvr. rmr. foU. naj. 

 V dorr of 



N.I 



N. COT. Tmr. Iota. BMJ 

 N. doryofBUBim 

 Cobmlt nitrate: 



N. tmra. rmr. ear. mmj . 

 N. eurr. rmr loth- OMJ 

 N dory of BUI 



N rurr rmr. Mk. BMJ 

 N. doty afi 



00 

 97 



: 



67 73 

 70 



;: 



:- 



M 





. 



: 



.- 



violet, tad 



mfrmnio;aod it 

 rto^T. 



- 



Table A 19 ibowi the MMtini i*mAtln in ptrant- 

 fM of toUI tUrch gdatiniicd at definite interraU 

 (imrtn). 



Vkxocrrr-UACTioM Cuirmm. 

 This tectioo treU of the relocity-ratetioB curr of 

 the trch of JN'triiw MmiMMt Tar. eonutm m*jor. N. 



amifol* rar. fotktryilli m*jor. and AT. glory of'mrmt. 

 bowing the qoantitatire difference* in the behavior to- 

 ward different reagent* at definite time-interrala. 

 (Charts D tit to DMt.) 



Amonjrthe oonqNOMMM featnre. of thaw charts an: 



( 1 ) The cloeenew and cormpondrnce of the currM 

 of all three starches, excepting in the reactions with 

 potasnom snlpbocyanate in which there appears to be ft 

 marked disproportionately low reartiritj of .V. taminui* 

 rar. conuea major, in comparison with N. cvrrifolie rar. 

 fotkergtili major, the departare becoming more and more 

 marked during the course of the experiment. It is of 

 importance to note that the reactions of the former and 

 the hybrid are practically absolutely identical With a 

 slightly stronger solution of the reagent or a longer 

 period of study it is probable that this discrepancy would 

 become markedly less. The extremely rapid or slow 

 reactions of all three sUrrhes with pyrogalfic arid, sul- 

 phuric acid, potassium hydroxide, potassium iodide, so- 

 dium sulphide, cobalt nitrate, copper nitrate, cnpric 

 chloride, barium chloride, and mercuric chloride yield 

 curres that are wholly or practically valueless for satis- 

 factory differential study. 



(2) The curve of JV. tarnirngis rar. conuem major is 

 higher than the curve of the other parent A*, currifolia 

 rar. fothtrgilli major in the reactions with chromic acid, 

 nitric acid, potassium sulphocyanate, potassium sulphide, 

 sodium hydroxide, calcium nitrate, uranium nitrate, and 

 strontium nitrate; and lower in reactions with chloral 

 hydrate, hydrochloric acid, sodium salicylate, bat in 

 sereral the differences are slight 



(3) The curres of the hybrid hear rarrinp relation* 

 to those of the parents. There are marked tendencies 

 to mtw<Bi to the pollen parent and to both parents; 

 little tendency to the seed parent ; none to be the highest 

 of the three curres ; and a rery marked tendency to be 

 the lowest with equal inclination to each parent 



(4) An carry period of high resistance followed by 

 a rapid to moderate gelatinization is noted only in the 

 experiments with chromic arid and nitric acid, espe- 

 cially in the first, and in the Utter only in N. currifolia 

 rar. fothfryilli major. 



(5) The earliest period during the 60 minutes that is 

 best for the differentiation of the three starches is for 

 chloral hydrate, potassium sulphide, sodium salicylate, 

 and strontium nitrate at the end of 5 minutes ; for nitnr 

 acid and hydrochloric acid at 15 minutes; for chromic 

 acid at 30 minutes; and for potassium sulphocyanate, 

 sodium hydroxide, calicum nitrate, and uranium nitrate 

 at r,0 minute*. With the rery slow reactions, including 

 those with pyrogmllic acid, sulphuric acid, potasnun 

 iodide, sodium sulphide, cobalt nitrate, copper nitrate, 

 cnpric chloride, barium chloride, and mercuric chloride, 

 if any differentiation is possible, the longer the period of 

 the reaction the better. 



REAcno-nrrjfm8 or TH HYBHB. 

 This section treats of the rss^km-intsMJiies of the 



deficit in relation to the parent. (Table A It* and Charts 

 D 232 to D 252.) 



