.\.\l;i [£ 



71 



Table A K> shows the reaction-intensitii 

 ages of total starch gelatinized al definite intervals 

 (minutes). 



Velocity-reaction Ci rves. 



Tins section treats of the volocity rea 

 of the starches of Narcissus poelicus ornalus, A 

 poetarum, N. j hen and N. poelicus dante, 



showing the quantitative differences in the behavior to- 

 ward different reagents at different time-intervals. 

 (Charts D259 to D 264.) 



Conspicuous anion- the features of these charts are 

 the following : 



(1) In the five charts there is i i manifest 

 tendency in each chart for all four curves to keep 



-I-, the only places where there is leaning toward a 

 well-marked separation arc in the charts for chromic 

 ai i.l and nitric acid at the 15-minute interval. In the 

 sulphuric-acid reaction gelatinization proceeds with such 

 rapidity that there is not, except in one instance, what 

 can lie accepted as an entirely satisfactory differentiation 

 of any one starch from any other, this instance being the 

 -in n h of N. poeticus pot tarum . winch reacted 

 tinctly less rapidity than the other three (which react 

 with identical intensity) during the first three minutes. 



(2) The four curves hear varying relations to each 

 other in the different reaction-. 



(3) The curve of N. poeticus ornatus is the nig 



of the four and well separated from the other three in 

 the reactions with chloral hydrate and chromic acid; the 

 lowest at first and intermediate finally with nitric acid ; 

 and practically the same, but with a lower tendency than 

 in the other three, with pyrogallic acid, although in this 

 iva. tiou the curves of N. poeticus <>niutu.<, X. poeticus 

 poetarum, and N. poeticus herrick are practically the 

 same. There is an obvious tendency for the curves of 

 .V. poeticus poetarum, N. poeticus herrick, and A', purli- 

 eus dun lc to keep close in the reactions with chloral hy- 

 drate and chromic acid. 



(4) The curves of the two hybrids tend to run closely. 

 In the reactions with chloral hydrate and sulphuric acid 

 they are the same; with chromic acid very marly the 

 Bame; and with pyrogallic acid and nitric acid they are 

 separated sufficiently for differential purposes. The 

 curve of the hybrid X. poeticus herrick is higher than the 

 curve of the other hybrid in the chromic-acid reaction, 

 lower in the pyrogallic-acid reaction, ami for the 



part lower in tlie nitric-acid n action. 



(5) An early period of resistance is noted particu 

 larly in the reactions with chromic acid and pyrogallic 

 add, and is suggested in the curves of the nitric acid. 



(6) The earliest period at which the curves are best 

 separated and hence the best for differential purposes is al 

 3 minutes in the reaction with sulphuric acid ; ai 5 min- 

 utes in those with chromic acid, pyrogallic arid, and 

 nitric acid; and al 60 minutes in that with chloral 

 hydrate. 



Kl &.CTION-INTENSITIES OF THE EyBRIDS. 



This section treats of the reaction intensities of the 

 hybrids as regards sameness, intermedial m 

 and deficit in relation to the parents. (Table \ L3, 

 Charts D 259 to D 264.) 



I trick 



are thi : the 



the sarni 

 iodine, I hydrate, and 



, intei ne dial- 

 tempera! are, and chromic acid (in tw 

 parent and in one nearer the pollen parent); hi 

 with nitric acid and sulphui 

 one as to the other parent and i 

 at) ; and lowest w , 



i reactivities of the hybrid N. \ 

 the same as il irent in the sulph 



■ ■id read ion ; thi sarni i 



the reactions with iodine, gentian violet, safranin, 

 chloral hyd both pari 



reaction ; inti 1 1 



tion, ti are, chromic acid, and nitric acid (in 



being i at, in oni 



parent, and in one mid-internn 



allic acid, beii rent; 



and lowest in n 



following is a summary of the reaction-inb 



Same as seed pan M 

 Same us pollen parent 

 Same as n«aii pai 



Intermediate 



Highest 



Lowest 



The varying relationships of tie- two h the 



parents in the individual reactions is q irked. 



Thus, in the polarization reactions both are bate 

 and nearer the - d 



are the same as the pollen parent; in the gentian 

 reaction one is lower than either parent ai 

 ei >l pan at, but the other is th p illen 



parent, etc. 



Composite Corves of Reaction 



This section deals with i the 



-Lou bag the differentiate o of the 

 stare! ircissus poeticus ornatus, A. poelicus 



tarum, X. poeticus herrick-. and X. poeticus d 



The most conspicuous features of this chart are: 



( ] | 'Ih, inarlo : - of all four « . the 



very clo i and falls, she 



agrecc dven spei 



(2) In .V. / i with .V. 



eticus !>•■< tarum I lie higher i 



chloral hydrate, chromic acid, nitric a. id. and sulphuric 

 acid; the same or practically tl 

 : ; and the lower 

 safranin, gentian violet, and temperature. 



i In A. , ornatus the vi 



with sulphuric 



with polari; 

 safranin : the low i 

 ture, pyrogallic acid, and nitric . 

 ral hydrate. 



