VUICI88TJS. 



M 



to a in.-!. Tiit.- M-paration U-m^ in the reactions with 

 chromic acid and nitric acid. 



i : > In .V. abscuunis in comparison with* the other 

 parent the higher reaction* with polarization, < -lirnu-- 

 arid, and nitric acid ; the lower reactions with iodine, 

 gcntnm \iolet. oafrunin, and tem|>eriitiire ; and the same 

 r |.r:n tn ally the Mine reaction* with chloral hydrate, 

 jallie acid, and sulphuric acnl. 



VIM the verv high reaction with sul- 

 phuric acid; the hi^-li reaction with chromic acid; the 

 modi-rate reaction* with |<olarization, iodine, safranin. 

 and pyropillic acid ; the low reactions with gentian violet, 

 ire. and nitric acid: and the Tery low reaction 

 witli chloral hydrate. 



( I ) In A', fiftinu poelarum the very high sulphuric- 

 ion ; the absence of a high reaction ; the moder- 

 ate reactions with polarization, iodine, safranin, tem- 

 ure, and pyrogallic acid; the low reactions with 

 in violet, chromic ncid. und nitric acid; and tin- 

 low reaction with chloral hydrate. 



< In the hybrid the very high reaction with sul- 

 phuric acid ; the absence of a high reaction ; the moderate 

 <>ns with polarization, iodine, safranin, chromic 

 and nitric acid ; the low reactions with gentian 

 viol.-t, temperature, and pyrogallic acid; and the very 

 low reaction with chloral hydrate. 



The following is a summary of the reaction-intensi- 

 ties (10 reactions) : 



19. COMPARISONS or THE STARCHES or XARCUWK 



\ I HICAN8, N. ABSCIBSUB, AHD N. BICOLOB APRICOT. 



In histologic characteristics, polariscopic fipi 

 reactions with selenite, qualitative reactions with iodine, 

 and qualitative reactions with the various chemical reag- 

 ents the Marches of the parents and hybrid exhibit prop- 

 erties in common in varying degrees of development 

 together with certain individualities which collectively 

 in each case are distinctive of the starch. In hit- 

 tologic properties there are certain well-defined differ- 

 ences between the starches of the parents. In Narcisnu 

 abtcwmu compared with the other parent the polari- 

 scopic figure is not so well defined, and there are minor 

 differences in the lines; and with selenite the quadrants 

 are not so clean-cut and are more irregular, the colors 

 are more often pure, and more grains have a greenish 

 tinge. In the iodine reactions no qualitative difference 

 was recorded. In the qualitative reactions with chloral 

 hydrate, chromic acid, pyrogallic acid, nitric arid, and 

 sulphuric acid there are both properties in common and 

 differences which are quite definite. The starch of the 

 hybrid has fewer compound grains than in either parent, 

 and in form generally shows a cloaer relationship to 

 A", albifans than to .V. abscissa*. While the eccentricity 

 of the hilum is about the same in all three starches, the 

 character of the hilum is somewhat closer to that of 

 6 



N. abc\nu. In the character of the lamella and in the 

 size of the grains the relationship is closer to A', albitatu. 

 In the character of the polan ureand tin- appear- 



ance* with selenite the relationship i much closer to 

 .V. albiftuu. In the qualitati\c iodine reactions the raw 

 grain* show a closer relationship to A', olbicaiu. but 

 lifter heating the relationship in cloaer to the other 

 parent. In the qualitative chemical reactions peculiari- 

 ties of both parents are observed. With chloral hydrate 

 the reactions, on the whole, more closely reaenilile tho-te 

 of A 7 , albicuns; but in those with chromic acid, j.\ :< .-nllic 

 acid, nitric acid, and sulphuric acid they re*enii>l< 

 clonely those of the other parent There are also certain 

 individualities in the way of accentual i-n in the hybrid. 



Kcactum imtrHiitirt Krpmtrd by l.igltt. Color, tnd T'tnpm- 



turr Knrtum*. 

 I'olariMtimi: 



N ll>irii, low to high, value 37. 



N. abariMu, low to hih. hihcr than in N. all.ir.i... value 43. 



N. bioolor apricot, low to huh. the aame a* in N. all.imn.. value 37. 



I . !.. 



N. albieuM, moderate, value 55. 



N. abeciam, light to moderate, much \rm than in N. all.irani. 



value 40. 

 N. bioolor apricot, moderate, intermediate between the paranU, 



but much doeer to N. albicana, value 53. 

 Gontian violet: 



N. alhirarw, liuhl to moderate, value 40. 



N. aheriwu*. liaht to modrratr. lilit-r than in N. albirani. valur 33. 



N. bieolor apricot, light to moderate, the tune aa N. alhicana, 



value 40. 

 .Safranin: 



N. albksana, moderate, value 60. 



N. abKiMua. moderate. le than in N. albicaaa. value 47. 

 N. bieolor apricot, moderate, the aame a* N. albicani. value 50. 

 Trnipenture: 



N. alhicann. in majority at 70.2 to 72*. in all at 73 to 75*. mean 74*. 

 N. aburiamu. in majority at 00.5 to 71*. in all at 73 to 74*. mran 



73.5*. 

 N. bkolor apricot, in majority at 71 to 72.5*. in all at 74 to 70*. 



m< an 75*. 



The reactivity of A 7 , alhiran* is higher than that of 

 the other parent in the reactions with iodine, gentian 

 violet, and safranin ; and lower in those with polariza- 

 tion and temperature. The reactivity of the hybrid is the 

 same or practically the same an that of .V. alhiran* with 

 polarization, gentian violet, and safranin ; intermediate 



TABU A 19. 



