532 



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



of the total starch in 30 minutes; in about 63 per cent 

 of the grains and 89 per cent of the total starch in 45 

 minutes; in about 66 per cent of the grains and 94 per 

 cent of the total starch in 60 minutes. (Chart D 274.) 



The reaction with -potassium sulphide begins in a 

 few grains in 1 minute. Complete gelatinization occurs 

 in less than 0.5 per cent of both the entire number of 

 grains and total starch in 5 minutes; in less than 0.5 

 per cent of the total starch in 15 minutes; still com- 

 plete gelatinization is observed in but rare grains and 

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

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

 starch in 45 minutes; in about the same number of 

 grains and total starch in 60 minutes. (Chart D275.) 



The reaction with sodium hydroxide begins imme- 

 diately. Complete gelatinization occurs in about 1 per 

 cent of the entire number of grains and 5 per cent of 

 the total starch in 5 minutes; in about 19 per cent of 

 the grains and 43 per cent of the total starch in 15 min- 

 utes; in about 25 per cent of the grains and 58 per cent 

 of the total starch in 30 minutes; in about 39 per cent 

 of the grains and 73 per cent of the total starch in 45 

 minutes; in about 48 per cent of the grains and 78 per 

 cent of the total starch in 60 minutes. (Chart D 276.) 



The reaction with sodium sulphide begins in about 30 

 seconds. Complete gelatinization occurs in about 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 7 per cent of the total starch in 15 min- 

 utes; in about 6 per cent of the grains and 28 per cent 

 of the total starch in 30 minutes; in about 12 per cent 

 of the grains and 40 per cent of the total starch in 45 

 minutes ; in about 16 per cent of the grains and 50 per 

 cent of the total starch in 60 minutes. (Chart D 277.) 



The reaction with sodium salicylate begins imme- 

 diately. Complete gelatinization occurs in about 8 per 

 cent of the entire number of grains and 39 per cent of the 

 total starch in 5 minutes; in about 76 per cent of the 

 grains and 82 per cent of the total starch in 15 minutes; 

 in about 99 per cent of the grains and over 99 per cent 

 of the total starch in 30 minutes. (Chart D 278.) 



The reaction with calcium nitrate begins in a few 

 grains immediately. Complete gelatinization occurs in 

 about 0.5 per cent of the entire number of grains and 

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

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

 in 15 minutes ; in about 3 per cent of the grains and 14 

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

 per cent of the grains and 39 per cent of the total starch 

 in 45 minutes; in about 11 per cent of the grains and 

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

 D 279.) 



The reaction with uranium nitrate begins in but 

 rare grains in 1 minute. Complete gelatinization was not 

 observed in any grains and the reaction has begun in but 

 few, and less than 0.5 per cent of the total starch is 

 gelatinized in 5 minutes; complete gelatinization occurs 

 in about 0.5 per cent of the entire number of grains 

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

 the same percentage of the grains and 4 per cent of the 

 total starch in 30 minutes; in about 1 per cent of the 

 grains and 5 per cent of the total starch in 45 minutes; 



in about the same percentage of both the grains and total 

 starch in 60 minutes. ( Chart D 280. ) 



The reaction with strontium nitrate begins in rare 

 grains in 1 minute. Complete gelatinization was not 

 observed in any grains and about 1 per cent of the total 

 starch is gelatinized in 5 minutes; complete gelatiniza- 

 tion occurs in about 3 per cent of the entire number of 

 grains and 8 per cent of the total starch in 15 minutes ; 

 in about 10 per cent of the grains and 33 per cent of the 

 total starch in 30 minutes; in about 14 per cent of the 

 grains and 53 per cent of the total starch in 45 minutes ; 

 in about 22 per cent of the grains and 60 per cent of the 

 total starch in 60 minutes. (Chart D 281.) 



The reaction with cobalt nitrate begins in rare grains 

 in 1 minute. Complete gelatinization was not observed 

 in any of the grains and but slight progress is made in 

 the reaction, less than 0.5 per cent of both the grains 

 and total starch gelatinized in 5 minutes; complete 

 gelatinization is still not observed in any grains and 

 about 1 per cent of the total starch gelatinized in 15 

 minutes ; complete gelatinization occurs in about 0.5 per 

 cent of the grains and 2 per cent of the total starch in 

 30 minutes; little if any further progress noted in 45 

 and 60 minutes, respectively. (Chart D 282.) 



The reaction with copper nitrate begins in a very 

 few grains in 1 minute. Complete gelatinization occurs 

 in about 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 4 per cent of the total starch 

 in 15 minutes; in about 2 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 7 per cent of the 

 total starch in 45 minutes ; in about the same percentage 

 of the grains and 9 per cent of the total starch in 60 

 minutes. (Chart D 283.) 



The reaction with cupric chloride begins in a few 

 grains in 1 minute. Complete gelatinization was not 

 observed in any of the grains and 0.5 per cent of the 

 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 ; 

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

 total starch in 30 minutes; in about 2 per cent of the 

 grains and 4 per cent of the total starch in 45 minutes ; 

 in about the same percentage of the grains and 5 per cent 

 of the total starch in 60 minutes. (Chart D 284.) 



The reaction with barium chloride has begun in but 

 few grains by a slight deepening of the fissures in 2 

 minutes. Complete gelatinization does not occur in any 

 of the grains and the process has begun in but few in 

 5 minutes; very little if any advance occurs in 15, 30, 

 45, and 60 minutes, respectively. (Chart D 285.) 



The reaction with mercuric chloride begins in very 

 rare grains in 2 minutes. Complete gelatinization was 

 not observed in any of the grains and the reaction had 

 begun in but very few in 5 minutes ; complete gelatiniza- 

 tion was not observed in any of the grains and in only 0.5 

 per cent of the total starch in 15 minutes; complete 

 gelatinization occurs in rare grains, less than 0.5 per 

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

 total starch in 30 minutes; only rare grains are com- 

 pletely and 3 per cent of the total starch gelatinized in 

 45 minutes; and about the same amounts of both the 

 grains and total starch in 60 minutes. (Chart D 286.) 



