504 



DATA OF PROPERTIES OF STARCHES OF PARENT- AND HYBRID-STOCKS. 



The rcnetion with sodium hydroxide begins in a few 

 grains in half a minute. Complete gelatinization occurs 

 in about 1 per cent of the entire number of grains and 2 

 per cent of the total starch in 5 minutes ; in about 2 per 

 cent of the grains and 3 per cent of the total starch in 

 15 minutes; in about 7 per cent of the grains and 10 

 per cent of the total starch in 30 minutes ; in about 10 per 

 cent of the grains and 14 per cent of the total starch in 

 45 minutes; and about 16 per cent of the total starch in 

 60 minutes. (Chart D 221.) 



The reaction with sodium sulphide begins in a few 

 grains immediately. Complete gelatinization occairs in 

 0.5 per cent of the entire number of grains and 2 per cent 

 of the total starch in 5 minutes; in about 1 per cent of 

 the grains and 3 per cent of the total starch in 15 min- 

 utes; in about 2 per cent of the grains and 4 per cent 

 of the total starch in 30 minutes; in about the same per- 

 centage of the grains and 6 per cent of the total starch in 

 45 minutes ; little if any further advance in 60 minutes. 

 ( Chart D 222.) 



The reaction with sodium sulicylate begins in half a 

 minute. Complete gelatinization occurs in about 76 per 

 cent of the entire number of grains and 89 per cent of 

 the total starch in 5 minutes; in about 98 per cent of 

 the grains and 99 per cent of the total starch in 10 min- 

 utes. ( Chart D 223.) 



The hilum and lamellae are as distinct as in N. sar- 

 niensis var. corusca major, but less distinct than in N. 

 bowdeni, and a narrow refractive band which is as distinct 

 as in IV. sarniensis var. corusca major is slowly formed 

 about the margins of the grains. Gelatinization usually 

 begins at the distal end and then at the proximal, as 

 in many grains of 2V. bowdeni, but it may begin at the 

 proximal end first, then at the distal end, as noted in 

 both parents, and gelatinization progresses more smoothly 

 than in either parent with less fissuration. The most 

 resistant part of the grain is, as in N. boivdeni, usually 

 just distal to the hilum, but gelatinization of this is not 

 accompanied by so much infolding and imagination of 

 the capsule as in N. bowdeni, and in this is more like 

 N. sarniensis var. corusca major. The gelatinized grains 

 are large and not so distorted as in IV. bowdeni, but more 

 than in TV. sarniensis var. corusca major. N. giantess 

 shows qualitatively a somewhat closer relationship to 

 N. bowdeni than to TV. sarniensis var. corusca major. 



The reaction with calcium nitrate begins in a few 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in about 0.5 per cent of the 

 grains and 2 per cent of the total starch in 15 minutes; 

 in about 3 per cent of the grains and 6 per cent of the total 

 starch in 30 minutes; in about the same percentage of 

 the grains and 10 per cent of the total starch in 45 min- 

 utes; in about the same percentage of the grains and 

 15 per cent of the total starch in 60 minutes. (Chart 

 D224.) 



The reaction with uranium nitrate begins in a few 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes ; in about 0.5 per cent of the 

 grains and 3 per cent of the total starch in 15 minutes; 

 in about 1 per cent of the grains and 9 per cent of Hie 

 total starch in 30 minutes; in about 3 per cent of the 



grains and 14 per cent of the total starch in 45 minutes ; 

 in about 7 per cent of the grains and 20 per cent of the 

 total starch in 60 minutes. (Chart D 225.) 



The reaction with strontium nitrate begins imme- 

 diately. Complete gelatinization occurs in about 24 per 

 cent of the entire number of grains and 65 per cent of 

 the total starch in 5 minutes ; in about 66 per cent of the 

 grains and 88 per cent of the total starch in 15 minutes; 

 in about 82 per cent of the grains and 91 per cent of 

 the total starch in 30 minutes; in about 89 per cent 

 of the grains and 95 per cent of the total starch in 45 

 minutes ; in about 93 per cent of the grains and 96 per 

 cent of the total starch in 60 minutes. (Chart D 226.) 



The reaction with cobalt nitrate begins in rare grains 

 in 2 minutes. Complete gelatinization occurs in much 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in less than 0.5 per cent of the 

 grains and total starch in 15 minutes; in less than 0.5 

 per cent of the grains and 1 per cent of the total starch in 

 30 minutes; little if any further advance in 45 and 60 

 minutes. ( Chart D 227.) 



The reaction with copper nitrate begins in a few 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 0.5 per cent of the total starch in 5 minutes; in less than 

 0.5 per cent of the grains and 2 per cent of the total 

 starch in 15 minutes ; in about 1 per cent of the grains 

 and 3 per cent of the total starch in 30 minutes; in 

 about 4 per cent of the grains and 10 per cent of the 

 total starch in 45 minutes ; in about the same percentage 

 of the grains and 15 per cent of the total starch in 60 

 minutes. (Chart D 228.) 



The reaction with cupric chloride begins in a few 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes; in about 0.5 per cent of the 

 grains and 1 per cent of the total starch in 15 minutes; 

 little if any advance in 30 and 45 minutes ; in about the 

 same percentage of the grains and 2 per cent of the total 

 starch in 60 minutes. (Chart D 229.) 



The reaction with mercuric chloride begins in rare 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes ; little if any further prog- 

 ress in 15, 30, 45, and 60 minutes, respectively. (Chart 

 D230.) 



The reaction with mercuric chloride begins in rare 

 grains in 2 minutes. Complete gelatinizatiou occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in less than 0.5 per cent of the 

 grains and total starch in 15 minutes; little if any 

 advance in 30, 45, and 60 minutes, respectively. (Chart 

 D231.) 



NERINE ABUNDANCE (HYBRID). 



(Plate 7, fig. 42; Charts D 211 to D 231.) 



HISTOLOGIC PBOPERTIES. 



In form the grains are usually simple and isolated 

 as in A T . sarniensis var. corusca major, and there is even 

 a smaller number of compound grains and of aggregates 

 than in that starch ; but occasionally a compound grain is 

 seen of some of the types described under TV. bowdeni, but 

 not found in TV. sarniensis var. cnrusra major. The 

 grains are less irregular than those of TV. boivdeni and 



