H^EMANTHUS. 



437 



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

 same percentage in 45 minutes; and in about the same in 

 60 minutes. (Chart D94.) (Insullieient material to 

 study qualitative reaction.) 



The reaction 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 12 

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

 in 15 minutes; in about 20 per cent of the grains and 2 I 

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

 same percentage of grains and 27 per cent of the total 

 starch in 45 minutes; and in about 28 per cent of the 

 grains and 35 per cent of the total starch in 60 minutes. 

 ( Chart D 95.) 



The reaction with sodium sulphide begins in a few 

 grains in half a minute. Complete gelatiuization occurs 

 in about 1.5 per cent of the entire number of grains and 

 2 per cent of the total starch in 5 minutes; in about 3.5 

 per cent of the grains and 5 per cent of the total starch 

 in 15 minutes; in about 6 per cent of the grains and 7.5 

 per cent of the total starch in 30 minutes; in about 7 per 

 cent of the grains and 9 per cent of the total starch in 

 45 minutes ; and in about 8 per cent of the grains and 

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

 D96.) 



The reaction with sodium salicylate begins in half 

 a minute. Complete gelatiuization occurs in about 6 

 per cent of the entire number of grains and 9.5 per cent 

 of the total starch in 5 minutes ; in about 30 per cent 

 of the grains and 36 per cent of the total starch in 30 

 minutes; in about 67 per cent of the grains and 10 per 

 cent of the total starch in 30 minutes; in about 90 per 

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

 45 mimvtes; and in over 97 per cent of the grains and 98 

 per cent of the total starch in 60 minutes. (Chart D 97.) 



A small bubble appears at the hilum which in the 

 majority of grains is not inclosed within an enlarged 

 fissure ; this bubble, however, is found in more grains and 

 expands to greater size than in //. katherince. The 

 lamella? do not become sharply defined in most of the 

 grains, though in more than in //. katherince. " A refrac- 

 tive border is formed which is frequently sharply defined 

 from the main body of the grain, and in which the 

 lamella? sometimes become sharply defined previous to 

 sudden gelatinization of this border. The methods of 

 gelatinization are more varied and the process is less 

 rapid than in //. leathering, the latter being rather re- 

 markable since with many reagents the reverse is found. 

 The same methods of gelatiuization are found as noted 

 for H. katherince, and in addition the lamella? of the 

 refractive border may become very sharply defined, fol- 

 lowed by sudden gelatinizatiou of this border without 

 distortion ; complete solution often then occurs in this 

 gelatinized border and the reaction proceeds in the re- 

 maining body of the grain according to methods described 

 in H. katherince. 



The gelatinized grains are swollen and distorted, but 

 less distortion is found than in //. katherince; either par- 

 tial or complete solution more quickly follows gelatiniza- 

 tion in the border of the grain than in II. katherince. 



The reaction with calcium nitrate begins in a few 

 grains in 1 minute. Complete gelatiuization occurs in 



about 1 per cent, of the entire number of grains and 2.5 

 per cent of the total starch in 5 minutes; in about 3 

 per cent of the grains and 3.5 per cent of the total starch 

 in 15 minutes; in about 4 per cent of the grains and 

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

 5 per cent of the grains and 5.5 per cent of the total 

 starch in 45 minutes; and in about 5.2 per cent of the 

 grains and 6 per cent of the total starch in 60 minutes. 

 (Chart D 98.) 



The reaction with uranium ni/rnle begins in a few 

 grains immediately. Complete gelatinization occurs in 

 about 1.5 per cent of the entire number of grains and 

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

 same percentage in 15 minutes; in about 3 per cent of 

 the grains and 3.5 per cent of the total starch in 30 

 minutes; in about 3.5 per cent of the grains and 5 per 

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

 same percentage of each in 60 minutes. (Chart D 99.) 



The reaction with strontium nitrate begins in rare 

 grains in half a minute. Complete gelatinization occurs 

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

 1.5 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 3 per cent of the grains and 

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

 5 per cent of the grains and 8 per cent of the total starch 

 in 45 minutes; and in about 6.5 per cent of the grains 

 and 9 per cent of the total starch in 60 minutes. (Chart 

 D 100.) 



The reaction with cobalt nitrate begins in rare grains 

 in half a minute. Complete gelatinization was not ob- 

 served among the entire number of grains, and the process 

 has begun in but few, much less than 0.5 per cent in both 

 the entire grains and total starch in 5 minutes ; very 

 slight progress in 15 minutes ; in about 0.5 per cent of 

 the grains and 1 per cent of the total starch in 30 min- 

 utes; very slight if any progress in 45 and 60 minutes, 

 respectively. (Chart D 101.) 



The reaction with copper nitrate begins in very rare 

 grains in half a minute. Complete gelatinization occurs 

 in but rare grains and the process has begun in but few, 

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

 about 0.5 per cent of the total starch gelatinized in 5 

 minutes; very slight progress occurs in 15 minutes; 

 about 0.5 per cent of the grains completely gelatinized 

 and about 1 per cent of the total starch in 3d minutes; 

 about the same in 45 and 60 minutes, respectively. 

 (Chart D 102.) In the few grains affected, gelatiniza- 

 tion begins at the distal end accompanied by distention 

 of the capsule when the grains are elongated, but along 

 the course of fissures through the mesial region in the 

 more rounded forms. 



The reaction with cupric chloride begins in rare 

 grains in 1 minute. Complete gelatinization was not 

 observed in any grain and the process has begun in but 

 few, much less than 0.5 per cent of both the entire num- 

 ber of grains and of the total starch in 5 minutes ; still 

 no complete gelatinization noted but about 0.5 per cent 

 of the total starch gelatinized in 15 minutes; complete 

 gelatinization occurs in about 0.5 per cent of the entire 

 number of grains and 1.5 per cent of the total starch in 

 30 minutes; slight progress in 45 minutes; in about 1 



