II KM \NI1U S. 



I'.l 



OeatiaoTiolet: 



II kathrnnjv. moderate to dvp; ralue tO. 



II puniemu. modrrmtrly deep to deep, alichlly 



katberina; value 03. 

 H. konic albert, moderate to dmp. not eo derp a* ia UM parent*. 



ralueM. 

 Sa/ranin : 



II k.ihrriiue. moderate to deep; Tain* 00. 



II punicmi*. m.lrrml.|y deep to deep. .lichUy deeper than in H 



l.ilirnnir. value 03. 

 H. k6m allTt. moderate to dwp. not ao dwp a* in UM parent* 



ralue M. 

 Temperaturr 



H k.thcrina. majority at 79 to 80*. all at 83 to M*. mean ST. 

 H punfeeua, majority at 77 to 79*. all at 81 to 82.8*. mean 81.78' 

 II Ldwcalt>rrt. U a^>rityat80toH2*.aIlat83.6to84*.nHMU83.2&' 



Tin- rva.imty of II. katkerina i higher than that 

 r (..ir.-ut in the reaction with M-'MI.- mid lower 

 with polri/.ati..ii. gentian violet, wtfranin, 

 ami tetii|>eratuiv. The hybrid it mid-intermediate in 

 M. .n. t!i,- highest in the polarization reac- 

 tion, lowest in the gentian violet and safranin reaction*, 

 and tlu> same aa that of the need parent in the tempera- 

 ture reaction. In three it is closer to or the same M 

 the wed parent, in one closer to the pollen parent, and 

 in one mid-intermediate. 



Table A 6 shows the reaction-intensities in percent- 

 of total starch gelatinised at definite intenrals 

 ( minuted). 



VEUX-ITY-RKACTION CURVES. 

 following section deals with velocity-reaction 

 - "f the starches of Hamanthtu katherina, H. j>u- 

 <. and 77. konig albert, showing the quantitative 

 * in the behavior toward different reagent 

 t 'iie-interval*. (Charts D 106 to D 126.) 



most conspicuous features of these chart* are : 

 ( I i The marked tendency for the curves of 77. kalh- 

 ' and the hybrid to run together, usually very 

 . . and well separated from the curve of 77. puniceut. 

 Both feature* are well exhibited in all of the reactions, 

 with the exception of those with chloral hydrate, jnr<>- 

 gallio arid, sodium salii-ylate. and barium rhloride. 

 Even in these instances the closer relationship of //. 

 katherimr and the hybrid is evident. 



The tendency for the curve of the hybrid to an 

 intermediate position between those of the parent-stocks, 

 although distinctly closer to that of H. kaiherina, as 

 shown in the reactions with chromic acid, pyrogallic 

 acid, nitric acid, sulphuric acid, hydrochloric acid, and 

 sodium salieylate. In the chloral-hydrate reaction the 

 curve of the hybrid is curiously distinctly lower than 

 that of either parent In the remaining reactions, 14 

 in number, the starches of both H. kaiherina and the 

 hybrid are so resistant that such differences as are re- 

 corded are slight and fall within the limit* of error, 

 with other resistant starches modifi- 

 cations in the titrengths of the reagents would doubtless 

 elicit peculiarities in accord with the foregoing. 



The individuality of each of the chart* with few 



:ion ; hence, the peculiarity of each chart in specific 



relation to the reagent Some bear somewhat clow 



resemblances, aa for instance, those particularly of 



pyrogallic and nitric acid, and those of another group 



including the potassium iodide, potassium hydroxide, 



potassium sulphocyanate. potassium sulphide, sodium by- 



-odinm sulphide, calcium nitrate, strontium 



nitrate, and cupric chloride, in which the main differ- 



etween the positions of the curves lie* in the height 



of the curves of 77. punicrwt. The curve* of the sodium- 



salicylate reactions are of a markedly different character 



from those of other chemical reagent* because of the 



high reactivities of all three starches. High reactivities 



of 77. punictiu are also exhibited in the charts for pyro- 



